| TSUBAKIMOTO CHAIN CO. Patent applications |
| Patent application number | Title | Published |
|---|
| 20130090201 | TRANSMISSION GUIDE - A transmission guide comprises a synthetic resin shoe supported by and integrally molded with a synthetic resin base by two-part molding. A guide length retaining mechanism, which can be formed by one or more protrusions on the back of the shoe and one or more cooperating recesses on the supporting surface of the base, retains the shoe against longitudinal movement relative to the base. A guide width retaining mechanism, which can be formed by projections on the edges of the shoe and cooperating holes formed in side walls extending from the supporting surface of the base, retains the shoe against widthwise movement relative to the base. | 04-11-2013 |
| 20130075130 | FLEXIBLE PROTECTIVE GUIDE INTERNALLY HOLDING LONG MEMBERS - A protective guide internally holds long members including at least one of flexible cables and ducts. The protective guide includes a flexible curved strip-shaped base and plural flexible sectioning members. The base is made of a synthetic resin, formed into a long plate and has a longitudinal direction. The sectioning members are also made of a synthetic resin, permitted to uprise from both ends of the base and spaced apart from each other in the longitudinal direction, the both ends being opposed to each other in a direction perpendicular to the longitudinal direction. The sectioning members cooperatively define a space for accommodating the long members along the base. The base has a cross section inwardly curved toward the space, as viewed in the longitudinal direction. Each sectioning member has a ceiling opposed to the base, the ceiling being divided into two portions in a direction perpendicular to the longitudinal direction. | 03-28-2013 |
| 20130075129 | FLEXIBLE PROTECTIVE GUIDE INTERNALLY HOLDING LONG MEMBERS - A protective guide has a long shape and internally holds long members including at least one of flexible cables and ducts. The protective guide includes a flexible curved strip-shaped base and a plurality of flexible sectioning members. The base is made of a synthetic resin, formed into a long plate and has a longitudinal direction. The sectioning members are also made of a synthetic resin, permitted to uprise from both ends of the base and spaced apart from each other in the longitudinal direction, the both ends being opposed to each other in a direction perpendicular to the longitudinal direction. The sectioning members cooperatively define a space for accommodating the long members along the base. The base has a cross section inwardly curved toward the space, as viewed in the longitudinal direction. | 03-28-2013 |
| 20130075128 | PROTECTIVE GUIDE FOR CABLES AND BRACKET USED FOR THE PROTECTIVE GUIDE - A protective guide internally holds long members including at least one of flexible cable and duct to move in harmonization with the movement needed by the long members. The guide includes a flexible long plate-shaped base made of a synthetic resin and having a longitudinal direction, flexible sectioning members made of a synthetic resin, and two brackets. The sectioning members uprise from ends of the base, spaced apart from each other by gaps in the longitudinal direction, the ends facing in a direction perpendicular to the longitudinal direction, and cooperatively define a space for accommodating the long members along the base. The brackets detachably connect ends of the base to fixed and movable members of a machine installing the guide. Each bracket has a first engaging means detachably engaging the bracket with the gaps and a second engaging means detachably connecting the bracket to the fixed or movable member. | 03-28-2013 |
| 20130059691 | SILENT CHAIN - In a silent chain, frictional losses and noise are reduced, and power transmitting efficiency is improved, by making the inner profile of each guide plate sufficiently high in relation to a link plate tooth of a link plate overlapped by each said guide plate that engagement between a sprocket tooth and said link plate tooth takes place before engagement of the last mentioned sprocket tooth with said guide plate, even when the chain moves laterally. The tensile hardness of the guide plates is sufficiently low in relation to the bending rigidity of the connecting pins of the chain to prevent substantial warping of the guide plates as a result of tension acting on the chain. The back surfaces of the guide plates are configured to avoid contact with a sliding contact surface of a chain guide on which a back surfaces of the link plates of said chain can slide. | 03-07-2013 |
| 20130059688 | TRANSMISSION GUIDE - A transmission guide comprises a synthetic resin shoe and a more rigid synthetic resin base, integrally molded by two-member molding. The base is formed with a pair of spaced, opposed, side walls extending in the direction of elongation of the base along opposite edges of a shoe-supporting surface of the base. These side walls engage respective side edges of the shoe, and extend past the front surface of the shoe so that they can restrict lateral movement of a transmission chain sliding along the front surface of the shoe. Indentations in the side walls receive protrusions formed on the edges of the shoe. Edges of the openings of the indentations are chamfered or convexly curved to avoid interference with the movement of the chain along the guide. | 03-07-2013 |
| 20130053197 | TRANSMISSION GUIDE - In a transmission guide, a synthetic resin shoe and a synthetic resin base are integrally molded by two part molding. Strips projecting from a supporting surface of the base extend in parallel to the longitudinal direction of the base, and concave grooves formed in the shoe, which also extend in parallel to the longitudinal direction of the base and of the shoe, receive the strips of the base and are fused with the base. | 02-28-2013 |
| 20130053194 | CHAIN TRANSMISSION APPARATUS - In a power transmission utilizing a bushingless roller chain, the inner links of the chain have chain guide-contacting backs that have a convex arcuate shape, and the outer links are shaped so that they do not contact the chain guides. The rollers are wider than the sprocket teeth that they engage, and widthwise gaps between the ends of the rollers and the outer link plates allow the inner link plates to move in the widthwise direction. The gap between the inner surfaces of the rollers and the outer surfaces of the connecting pins of the chain is larger than the gap between the inner surfaces of the holes in the inner link plates and the outer surfaces of the connecting pins that extend through them. | 02-28-2013 |
| 20130035184 | TRANSMISSION GUIDE - The synthetic resin guide in accordance with the invention comprises an elongated synthetic resin shoe having a front surface for sliding contact with the transmission medium and a back surface opposite from the front surface and a plurality of engaging members disposed in longitudinally spaced relationship to one another. The guide also comprises an elongated synthetic resin base in contact with the back surface of the shoe and supporting the shoe, the base having a plurality of longitudinally spaced engaged portions each of which engages with one of the engaging members. One engaging member is fixed to the engaged portion with which it is engaged. The other engaging members are longitudinally movable relative to the engaged portions with which they are engaged. Thus, the guide allows longitudinal thermal expansion and contraction of the shoe relative to the base. | 02-07-2013 |
| 20130032677 | CABLE PROTECTION AND GUIDE APPARATUS - There is provided a cable protection and guide apparatus that improves efficiency of cable insertion and maintenance when a connecting arm attached to a link plate by a hinge structure is disconnected. In order to removably connect the connecting arm to the link plate, the guide apparatus has the hinge structure composed of a hinge stem and a hook that is rotatably engaged with the hinge stem. The hinge structure has a disengagement preventing portion that prevents the hook from disengaging from the hinge stem and a rotation restricting portion that restricts the rotation of the connecting arm in the disconnected condition. The rotation restricting portion is composed of a link-side engagement element and an arm-side engagement element. In the rotation restricting condition effected by engagement of the link-side and arm-side engagement elements, a rotational angle of the connecting arm is an obtuse angle. | 02-07-2013 |
| 20130025252 | CABLE PROTECTION AND GUIDE APPARATUS - A cable protection and guide apparatus is configured to suppress collision noise otherwise generated between a peripheral member and link frames due to polygonal movements of the link frames. Wear and damage of the cables otherwise caused by contact with a connecting plate is prevented. The apparatus comprises a plurality of link frames each having a cable rectangularly-shaped, in cross-section, accommodating space formed by a pair of laterally and separately disposed link plates. Connecting plates crosslink the link plates on cable-bend inner and outer circumferential sides. Link frames are connected bendably with each other in a cable longitudinal direction between a cable stationary end and a cable mobile end to protect and guide the cables. The cable-bend outer circumferential side connecting plate is provided with cylindrical elastic members surrounding the connecting plate across the crosslinking direction thereof. | 01-31-2013 |
| 20130008143 | CABLE PROTECTION AND GUIDE APPARATUS - The invention provides a cable protection and guide apparatus allowing a protecting and guiding apparatus to be downsized by reducing a radius of a polygonal bend formed when link plates are bent back in a cable longitudinal direction between a cable stationary end and a cable mobile end and achieving smooth relative movements of shoes that face with each other between the upper and lower cable-bend inner circumferential sides by easing impact energy and impact sound of the shoes. The shoes provided on the cable-bend inner circumferential sides of the pair of link plates laterally and separately disposed have slidable-contact portions having parallelogram slidable-contact surfaces configured to face to and to mutually slidably contact with each other between upper and lower cable-bend inner circumferential sides. | 01-10-2013 |
| 20120329590 | HYDRAULIC TENSIONER - In a hydraulic tensioner, the seating surface of a ball-type check valve, used to allow oil to enter the oil chamber of the tensioner while blocking reverse flow of oil, is formed with one or more grooves that allow leakage of oil from the oil chamber to an oil supply passage even when the ball is seated. The groove or grooves can have a decreasing depth or decreasing width, proceeding from the opening of the oil passage of the ball seat toward the oil chamber. Plural grooves can be provided at equal circumferential intervals, and the grooves can be circumferentially inclined. In each case, the groove or grooves improve separation of the ball from the seat, and thereby improve responsiveness of the tensioner to variations in chain tension. | 12-27-2012 |
| 20120324788 | PLANT CULTIVATING APPARATAS - There is provided a plant cultivating apparatus for saving space in an early stage of growth of plants, increases an amount of plants cultivated per unit space to achieve higher space efficiency, and which provides an optimum environment corresponding to the growth of the plants. The plant cultivating apparatus comprises a plurality of cultivation tray storage shelves arrayed in a plurality of tiers and a plurality of rows, each of the plurality of cultivation tray storage shelves being able to store a cultivation tray capable of cultivating a plurality of plant stocks, a cultivation tray transferring mechanism for moving the cultivation tray, and a handling mechanism capable of gripping and moving the plurality of plant stocks individually from the cultivation tray. | 12-27-2012 |
| 20120316020 | POWER TRANSMISSION CHAIN - In a roller or bushing chain, inner link plats have an oval shape, with a guide-contacting surface continuous with arc-shaped ends, and in the form of an arc having end points that are spaced from each other by a distance greater than the chain pitch but less than the greatest distance between parts of bushing holes in the inner link plates. The outer link plates have straight parallel edges parallel to the direction of chain elongation and semicircular ends continuous with the straight edges. The configuration of the inner link plates prevents the outer link plates from coming into contact with a chain guide. | 12-13-2012 |
| 20120309570 | RING-TYPE TENSIONER - In a ring-type tensioner, an expansible elastic ring disposed in a groove formed in the wall of a plunger-accommodating hole cooperates with teeth formed on the plunger to restrict axial movement of the plunger. The ring and the groove in the wall of the plunger-accommodating hole have flat radial surfaces for mutual engagement. However the ring also has oblique plunger-tooth engaging surfaces. The ring has manipulable end parts that can be locked in fixed relation to each other by a tool to secure the plunger against axial movement. The tool can also be inserted into a gap between the manipulable end parts to expand the ring and thereby release the plunger. | 12-06-2012 |
| 20120295747 | STATIONARY CHAIN GUIDE - An elongated stationary guide for a traveling transmission chain in an engine such as a timing chain has a narrow reinforcing groove formed along the longitudinal direction of a metal base plate of the guide by surface-pressing, whereby the base plate exhibits plastic deformation. The narrow reinforcing groove extends toward the ends of the base plate past the locations at which the base plate is mounted on an engine block by mounting bolts. | 11-22-2012 |
| 20120244975 | RATCHET-TYPE TENSIONER - A ratchet mechanism of the ratchet tensioner comprises a toothed ratchet element slidable in a housing and movable in a sliding direction, a plunger movable in an advance/setback direction and having rack teeth engageable by the teeth of the ratchet element, and a ratchet-biasing spring for biasing the ratchet element so that its teeth engage the rack teeth. The rack teeth have stop surfaces facing in the setback direction and sliding surfaces facing the advancing direction. The sliding surfaces are curved surfaces bulging in the advancing direction and in the direction of disengagement of the ratchet element from the rack teeth, the bulge being in an area extending from an entry starting location to an entry ending location. | 09-27-2012 |
| 20120228437 | ARTICULATED CABLE PROTECTION AND GUIDE APPARATUS - There is provided an articulated cable protection and guide apparatus that can securely and stably guide a large number of cables, can assure durability of articulated supporting members that operate between straight and bending postures for a long period of time, and can be easily disassembled and assembled at a machine frame-side stationary end-side connector unit or at a moving end-side connector unit. The articulated cable protection and guide apparatus comprises: a stationary end-side connector unit for affixing each stationary end of articulated supporting members, cables and a flexible belt member integrally to a machine frame-side stationary end area; a moving end-side connector unit for affixing each moving end of the articulated supporting members, cables and a flexible belt member integrally to a movable-side moving end area. | 09-13-2012 |
| 20120225743 | Rachet-Type Tensioner - A ratchet-type tensioner capable of restricting setback of a plunger includes a ratchet mechanism that allows setback of the plunger by sliding a ratchet element in a disengaging direction to disengage ratchet teeth from rack teeth when a reaction force acts on the plunger as a result of excessive chain tension. The ratchet element is slidable in a ratchet-receiving hole, and an inclination suppressing structure that prevents the ratchet element from becoming skewed in the ratchet receiving hole to an extent such that its forward end contacts one side of the hole while its rearward end contacts the opposite sides of the hole. | 09-06-2012 |
| 20120205498 | CABLE PROTECTION AND GUIDE DEVICE - There is provided an articulated cable protection and guide apparatus that can securely guide and cables between a machine frame-side fixing end area and a machine movable-side moving end area without scattering abrasion powder of the articulated supporting members and the cables to the outside and that can be easily installed in the machine frame-side fixing end area and the machine movable-side moving end area. Connector units, fixed to the machine frame-side fixing end area and the machine movable-side moving end area, integrally retain articulated end portions of the articulated supporting member, cable end portions of the cables and slot end portions of the flexible belt member and seal the slot end portions of the flexible belt member. | 08-16-2012 |
| 20120196712 | SILENT CHAIN TRANSMISSION SYSTEM - In a silent chain transmission, noise performance is improved by preventing guide plates of a silent chain from contacting sprocket teeth before the link plates of the chain contact the sprocket teeth. The silent chain transmission comprises a silent chain in engagement with a sprocket. The silent chain comprises guide rows, each having a pair of guide plates and a plurality of middle link plates, and non-guide rows, each having a plurality of inner link plates. An engagement starting point of the middle link plate with a sprocket tooth and an engagement starting point of the inner link plate with the sprocket tooth are set at positions such that the guide plate is prevented from contacting the sprocket tooth before the respective link plates start to engage the sprocket tooth when runout of the chain in the direction of its width occurs. | 08-02-2012 |
| 20120196709 | RATCHET-TYPE TENSIONER - There is provided a ratchet-type tensioner whose spring stopping washer for seating a ratchet biasing spring is rigidly and readily assembled to a ratchet-receiving hole so as not to fall out of the ratchet-receiving hole and which reduces flapping noise and prevents seizure of the plunger by securely and stably operating a ratchet mechanism in operating an engine. The ratchet-type tensioner | 08-02-2012 |
| 20120187271 | ARTICULATED CABLE PROTECTION AND GUIDE DEVICE - There is provided an articulated cable protection and guide apparatus that can securely and stably guide a large number of cables and can assure durability of articulated supporting members operating between straight and bending postures for a long period of time. The articulated cable protection and guide apparatus comprises articulated supporting members which can be easily cut and connected. Each of the articulated supporting members includes a large number of synthetic resin block bodies linked with each other. A plurality of flexible belt members includes tubular storing portions formed in parallel in a belt width direction. | 07-26-2012 |
| 20120167542 | LIFTING ENGAGEMENT CHAIN UNIT - There is provided a lifting engagement chain unit that autonomously erects a pair of engagement chains, ensures engagement accuracy between link plates and improves buckling strength. A plurality of buckling restricting attachment plates is arrayed along an outer surface of the engagement chains in a chain longitudinal direction. | 07-05-2012 |
| 20120122619 | RATCHET-TYPE TENSIONER - In a ratchet tensioner, rack teeth on a plunger are engaged by ratchet teeth on one end of a movable plug that slides in a hole in the tensioner housing along a direction orthogonal of the direction of movement of the plunger. The movable plug is prevented from rotating in the hole in which it slides so that the ratchet teeth engage the rack teeth on the plunger smoothly and reliably. | 05-17-2012 |
| 20120097348 | DEVICE FOR OPENING AND CLOSING CURTAIN - There is provided a curtain opening/closing device whose number of parts is reduced, which is lightened, whose safety and durability are improved, whose installation space is reduced, whose appearance is improved and which can be installed freely along a curved surface, and a vehicle carrying the curtain opening/closing device. The curtain opening/closing device comprises a spiral long coil member, a movable member capable of moving within the long coil member, a rail member rotably and loosely fitting the long coil member and having a slit continuous in a longitudinal direction and a rotational driving section fixed at one end of the rail member and rotating and driving the long coil member. The movable member is inserted within the long coil member so as to be movable in the longitudinal direction. | 04-26-2012 |
| 20120073938 | CONVEYOR CHAIN - A conveyor chain that enables magnet pieces for attracting and retaining articles conveyed on the chain. The magnet pieces are incorporated into synthetic resin link modules without changing a predetermined chain width and dimensioning of other device components. A large number of link rows consisting of a number of synthetic resin link modules are connected together so as to have a predetermined chain width W. At least some of the synthetic resin link modules have magnet storing blind holes which open in the chain width direction from link side surfaces such that a magnet piece can be insertably stored in the magnet storing blind hole and securely enclosed by the link side surface of an adjacent synthetic resin link module in the chain width direction. | 03-29-2012 |
| 20120071287 | SILENT CHAIN HAVING DEFORMABLE GUIDE PLATES - In a silent chain, guide plates are U-shaped so that they can deform when tension is applied to the chain, thereby avoiding deformation of the connecting pins of the chain and warping of the guide plates. When the chain is unloaded, the frontmost edges of front pin holes of intermediate link plates of each link row are located forward of the frontmost edges of the front pin holes of the guide plates of the same link row, and the rearmost edges of the rear pin holes of the intermediate link plates of each link row are located rearward of the rearmost edges of the rear pin holes of the guide plates of the same link row. | 03-22-2012 |
| 20120058851 | POWER TRANSMITTING TOOTHED BELT AND POWER TRANSMITTING DEVICE - A power transmitting toothed belt having improved positioning accuracy between the toothed belt and a pulley, increased durability, and reduced contact noise, comprising a rubber back layer, a plurality of core wires and a rubber layer having a plurality of belt teeth, wherein the belt teeth are at oblique angle with respect to the direction of the width of the belt. The belt teeth intersect with straight pulley teeth having a pitch equal to the pitch of the belt teeth. | 03-08-2012 |
| 20110300978 | TIMING PULLEY - There is provided a timing pulley whose noise is low, which is light-weight, whose pulley structure is simple and which excels in workability. The timing pulley comprises a cylindrical timing hub which is fitted around a power transmitting shaft, a pair of flange members provided apart on both end portions of the timing hub and a plurality of engagement pins disposed on peripheral edge portions of the pair of flange members in the circumferential direction thereof so as to extend between and through each of the flange members and so as to engage with mating teeth of a timing belt. | 12-08-2011 |
| 20110300977 | SPROCKET - In a sprocket comprising a sprocket hub, sprocket teeth and a cushion plate for contacting link plates of a transmission chain, the cushion plate is formed with concave portions at angular positions corresponding to the angular positions of the tips of the sprocket teeth, thereby avoiding contact, or reducing contact pressure, between the cushion plate and the middle parts of link plates of the chain. | 12-08-2011 |
| 20110287880 | CHAIN TENSIONER - In a tensioner having a ratchet mechanism composed of annular teeth on a plunger and an expansible resilient ring disposed in a groove formed in the inner peripheral surface of a plunger-accommodating hole in a tensioner housing, the rear surfaces of the annular teeth have a steep slope, and the front surfaces of the annular teeth have a gradual slope with a convex curvature such that the rate of change of the slope decreases proceeding in the direction of retraction of the plunger. | 11-24-2011 |
| 20110269584 | BALL-TYPE TENSIONER - A tensioner for a chain or similar power transmission medium comprises a spring-biased plunger having annular rack teeth with gradually sloping forward surfaces and steeper rearward surfaces. The teeth are engaged by radially movable balls received in inclined grooves in an axially movable annular ball seat disposed in an annular groove formed in the wall of a plunger-accommodating hole in a tensioner housing. The bottoms of the inclined grooves face a steep rearward surface of a rack tooth, and the annular ball seat is axially movable in the annular groove and biased in the plunger protruding direction by a spring that exerts a biasing force greater than the biasing force exerted on the plunger. The balls and the movable annular ball seat block retraction of the plunger on engine start-up, but permit retraction when excessive force is imparted to the plunger while the plunger is in a protruding condition. | 11-03-2011 |
| 20110263369 | CHAIN - In a chain comprising interconnected link plates at least some of which come into sliding contact with one or more chain guides, at least some of the link plate edges that come into sliding contact with the guides have a convex curvature with different curvatures on the front and rear sides of an apex at an intermediate location. The radius of curvature on the front side of the apex is greater than the radius of curvature on the rear side of the apex. The front and rear curvatures can be circular or cycloidal. Alternatively, one of the front and rear portions can be circular while the other is cycloidal. | 10-27-2011 |
| 20110263368 | SEAL CHAIN - In a seal chain, a seal mechanism comprises a pair of mutually facing seal members, a first seal member of the pair being in contact with an inner plate of the chain, and a second seal member of the pair being in contact with an outer plate of the chain. A pair of resilient annular lips formed on the first seal member are in sliding contact with a surface of the second seal member. Each sealing member has lubricant-filled grooves facing the plate with which it is in contact. | 10-27-2011 |
| 20110256970 | CHAIN TENSIONER - In a hydraulic tensioner, a tensioner housing is provided with an oil outflow channel communicating with a high pressure oil chamber formed by a plunger and the tensioner housing. A control valve in the oil outflow channel can be adjusted manually or automatically to optimize the damping performance of the tensioner in different engines and under different operating conditions, thereby obviating individualized machining of tensioner components to achieve optimum damping. | 10-20-2011 |
| 20110251002 | CHAIN GUIDE MECHANISM - In a chain guide mechanism having a guide bridge for integrally holding two chain guides, a chain and a driving sprocket for more efficient assembly and maintenance, the guide bridge has a oil inlet on a surface of its sprocket-pressing base for receiving oil from an oil supply port in an engine block on which the guide bridge is mounted. The oil inlet communicates, through an internal passage within the base of the guide bridge, with an oil discharge port within a groove in which teeth of the driving sprocket travel. | 10-13-2011 |
| 20110245053 | TOOL HOLDING AND CONVEYING CHAIN - There is provided a tool holding and conveying chain adapted to securely lock and position a tool pot, i.e., a connecting pin, to a pin hole of either an outer or inner link plate so that the tool pot does not to turn and to achieve steady and smooth attachment and removal of a tool in and out of the tool pot with a simple attachment structure. The tool pot has a pair of positioning flat portions formed by cutting a link plate attaching outer circumferential region of the tool pot and the outer link plate has a pair of positioning cooperative flat portions formed so as to bulge out of an inner circumference to a center of a pin hole. The positioning flat portions of the tool pot is fitted into and locked by the positioning cooperative flat portions when the tool pot is attached in the link plate. | 10-06-2011 |
| 20110240805 | MULTI-JOINT CABLE PROTECTION AND GUIDE DEVICE - There is provided a multi-joint cable protection and guide device that fits well with a flexible belt member in a flexed posture, that steadily protects and smoothly guides cables that assume the flexed posture, that requires fewer parts and that may be readily connected and disconnected corresponding as desired according to usage. The multi-joint supporting member has the flexible belt member in which cable inserting tubular portions are unitarily molded in parallel and a train comprising a plurality of block bodies flexibly connected with each other by concave-convex snap-fittings. The train of block bodies is inserted through the cable inserting tubular portions to control and support straight and flexed postures of the flexible belt member and each block body has a flexion outer peripheral-side curved surface whose curvature is equal to a radius of a flexed circular arc in the flexed posture. | 10-06-2011 |
| 20110237374 | TOOTHED BELT - A toothed belt includes: a belt main body in which a plurality of cords are arranged side by side in a widthwise direction of a rubber layer; a plurality of teeth portions formed at one surface of the belt main body; and a tooth cloth covering surfaces of the teeth portions. A cloth base material is obtained by impregnating a surface layer rubber composition into an original canvas and by forming a surface layer, and an adhesion layer rubber composition is attached to one surface of the cloth base material to form an adhesion layer, thus forming the tooth cloth. The rubber layer contains: HNBR including HNBR in which a Mooney viscosity at 100° C. is in a range of from 100 to 160; and a polymer alloy obtained by finely dispersing zinc methacrylate in HNBR. The rubber layer and rubber compositions preferably contain hydrogenated carboxyl NBR. | 09-29-2011 |
| 20110218068 | STATIONARY GUIDE FOR CHAIN TRANSMISSION - A stationary guide for an engine timing chain is mounted by engagement of two longitudinally space mounting holes with two pins protruding from an engine block. At least one of the holes is formed with a stop wall positioned to prevent improper reverse mounting of the guide, and preferably positioned so that its abutment with the end of a mounting pin positions the guide in proper alignment with the normal path of travel of the timing chain. | 09-08-2011 |
| 20110183800 | LINK PLATE - A link plate for a transmission chain composed of a plurality of link plates flexibly connected to one another has a guide-contacting edge for direct sliding contact with a chain guide. The guide-contacting edge is composed of a plurality of surface portions in alternating relationship with a plurality of grooves along the direction of chain travel. | 07-28-2011 |
| 20110183797 | CHAIN GUIDE MECHANISM - In a chain guide mechanism in which a pair of chain guides, at least one of which is a pivoted guide, are connected by mounting bosses a bridge so that the chain guides and bridge can be preassembled along with a chain and driving sprocket to form an integrated unit for installation in an engine, the chain guides include a chain-engaging guiding surface extending in a first direction from a location adjacent the mounting bosses, and a chain pressing portion extending in a second direction, opposite the first direction, substantially from the same location adjacent the mounting bosses. The pressing surfaces clamp the chain against the sprocket when a pivotable chain guide is rotated so that its chain engaging surface is moved away from the chain. | 07-28-2011 |
| 20110183796 | RATCHET-TYPE TENSIONER - In a ratchet-type tensioner having a toothed ratchet piston biased toward a rack of teeth formed on a protruding plunger in a direction transverse to the direction of plunger movement, the rack teeth and the ratchet teeth are mutually engageable and inclined at angles such that the biasing force urging the teeth of the ratchet piston into engagement with the rack teeth is sufficient to block retraction of the plunger during engine start-up but can be overcome when chain tension becomes excessive during engine operation following engine start-up. | 07-28-2011 |
| 20110173946 | CABLE OR THE LIKE PROTECTING AND GUIDING DEVICE - The invention provides a cable protecting and guiding device with a reduced radius of flexion formed when the device is bent back in a cable longitudinal direction between cable fixing and moving ends and which attains a smooth movement by continuously sliding along slidable-contact bottom portions of shoes disposed on upper and lower parts of the flexed cable inner peripheral side. A slidable-contact bottom portion of a shoe provided on the flexed cable inner peripheral side of a pair of link plates disposed apart in the lateral direction has a parallelogram slidable-contact bottom surface that slidably contacts between upper and lower shoes on the flexed cable inner peripheral side. | 07-21-2011 |
| 20110152022 | TENSIONER UNIT - A tensioner unit comprises a tensioner body, a gasket in overlapping relationship to the tensioner body whereby the gasket can be sandwiched between the tensioner body and a mounting surface to which the tensioner body is to be secured, and a threaded mounting bolt inserted through a mounting hole in the tensioner body for securing the tensioner body to the mounting surface. A bolt hole is provided in the gasket, and the mounting bolt also extends through the bolt hole. The gasket grips the bolt and holds the mounting bolt, the gasket, and the tensioner body, in fixed relationship to one another, and maintains the gasket in a predetermined aligned relationship with the tensioner body when the gasket is in overlapping relationship with the tensioner body during mounting of the tensioner body on the mounting surface. | 06-23-2011 |
| 20110121141 | MULTIJOINT CABLE PROTECTION AND GUIDE DEVICE - The invention provides a multijoint cable protection and guide device that steadily protects and guides cables and the like that assume flexed and straight postures. The device includes a flexible belt member in which a plurality of center tubular portions through which cables are inserted and a pair of right and left side tubular portions disposed in parallel along the center tubular portions. The center tubular portions and the pair of right and left side tubular portions are integrally molded. A pair of right and left multijoint supporting members is inserted through side tubular portions of the flexible belt member. The multijoint supporting member is composed of a large number of block bodies that are flexibly connected together by concave-convex fittings. | 05-26-2011 |
| 20110105258 | CHAIN GUIDE MECHANISM - In a chain guide mechanism, fixed and movable guides are attached to a guide bridge by cooperation of bosses on the guides with boss-receiving holes formed in spaced-apart elements of arms of the bridge. A fixed guide is held against rotation by cooperation of a projection on its mounting boss with a notch in a boss-receiving hole in a guide bridge arm element. A base, extending from an intermediate location at which the arms come together has a pressing structure that engages bosses on a driving sprocket, and a groove for receiving teeth of the driving sprocket. | 05-05-2011 |
| 20110101294 | ENGAGEMENT CHAIN - The invention provides a pair of engagement chains which has inner tooth plates, bushes, outer tooth plates and connecting pins and is integrated by engaging hook portions of the inner tooth plates and hook portions of the outer tooth plates and is branched by disengaging the hook portions of the inner tooth plates and the hook portions of the outer tooth plates. The pair of engagement chains further includes inflection restricted plates having inflection restricted surfaces and inflection restricting plates having inflection restricting portions that are connected on the both ends of the connecting pins. | 05-05-2011 |
| 20110092326 | PULLEY FOR USE WITH TOOTHED BELT - The invention provides a toothed-belt pulley that is capable of reducing pneumatic and plosive sounds and of reducing engagement noises while stably transmitting rotational movements by suppressing widthwise wobbling of a toothed belt and while reducing a manufacturing cost of the pulley by simplifying its manufacturing process and of improving a production yield by shortening its manufacturing time. The toothed-belt pulley has a disk whose inner circumference is fittingly attached to a rotary shaft and which is provided with teeth to be engaged with the toothed belt around the outer circumference and flanges erected on the both outer sides of the toothed belt, wherein each of the teeth has a concaved recess with which the toothed belt deformably engages in the widthwise center part thereof. | 04-21-2011 |
| 20110065542 | SILENT CHAIN - In a chain transmission incorporating a silent chain engaged with a sprocket, the plates of the chain are connected by sets of rocker pins extending through pin holes in the plates. The pin holes are elongated toward the center of each plate, and the elongation of each pin hole is greater than the maximum amount by which the distance between points on the respective rocker pins of each set increases when said chain is inflected to the maximum extent permitted by the sprocket in a portion of the chain in seating engagement with said sprocket. | 03-17-2011 |
| 20110030330 | CABLE PROTECTION AND GUIDE DEVICE - The invention provides a cable protection and guide device that steadily protects and guides a cable by rigidly anchoring and preventing a connecting arm from being disengaged upwardly. The device smoothly flexes and reduces torsional deformation. The hinged connecting arm extends across the flexional outer peripheral side of a pair of spaced apart right and left link plates and has a hook portion at one end of an arm body and a hinge portion at another end. An engaging circular arc portion of the hook portion engages with an engaging shaft of the link plate. Engaging projecting portions extend from the edge of the engaging circular arc portion and interengage with engaging step portions provided on the engaging shaft. | 02-10-2011 |
| 20110021298 | CHAIN TENSIONER - In a chain tensioner, an expansible ring is disposed in an internal groove formed in the inner wall of a plunger-accommodating hole near an open end thereof. The ring cooperates with grooves formed on the plunger to exert a ratchet action. The relationship between the angles of the surfaces of the internal groove and the grooves on the plunger allows the plunger to protrude, restricts retraction of the plunger on start-up of a chain transmission, but allows retraction when chain tension becomes excessive. In one embodiment, in which the ring is a C-ring, the tensioner housing can be formed with external threads for mounting in a threaded hole on a timing chain cover or other engine part. In other embodiments, the ring can have externally protruding levers for manipulation of the ring. | 01-27-2011 |
| 20110009221 | SILENT CHAIN TRANSMISSION SYSTEM - In silent chain transmission comprising a chain composed of rows of link plates connected in articulating relationship by connecting pins, at least one sprocket is provided with a pair of flanges that guide the chain by engaging sprocket-engaging teeth on the outermost plates of the chain. | 01-13-2011 |
| 20100304910 | LOW FRICTION SOUND-TYPE SILENT CHAIN - In a silent chain of the inner flank engagement and outer flank seating type, the link plate teeth are arranged so that their rearwardly facing inner flanks protrude slightly beyond the outer flank overlapping link plate teeth in a preceding row when the chain is straight and in tension. The rearwardly facing inner flank is composed of an arc-shaped engagement starting region adjacent the tip and a straight engagement guiding region extending toward the root. | 12-02-2010 |
| 20100298078 | RATCHET-TYPE TENSIONER - In a ratchet tensioner, a linearly moving ratchet for engagement with rack teeth on a plunger is operated a piston that is spring-biased in a direction to engage the ratchet teeth with the rack, and movable by oil pressure in a direction to disengage the ratchet teeth from the rack. The piston is located within a hole in the housing and, with that hole, forms a second high pressure oil chamber that can receive oil through an oil supply path independent of the oil supply path that carries oil to a first high pressure oil chamber formed by the plunger and the tensioner housing. | 11-25-2010 |
| 20100298077 | RATCHET-TYPE TENSIONER - In a ratchet-type tensioner, a rocking ratchet pawl is released from a rack of teeth on a tensioner plunger following engine start-up by a hydraulically operated pin slidable in a pin hole and caused to protrude therefrom by oil under pressure received directly from an external oil supply, or alternatively from the tensioner's high pressure oil chamber through a passage in the tensioner housing. Optionally, an orifice can be provided within the pin hole to control flow of oil when the supply is excessive and to avoid leakage when the supply is insufficient. | 11-25-2010 |
| 20100292039 | LUBRICANT AND OIL-FREE CHAIN - An oil-free chain is constructed by alternately connecting a pair of outer link plates connected using pins and a pair of inner link plates connected using oil-impregnated bushings into which the adjacent pins of the outer link plates adjacent to the inner link plates are fitted. The oil-impregnated bushings are impregnated with a lubricant having a kinematic viscosity in the range of ISO-VG grade 46 to 460, the weight % of an ingredient having the highest content among the elution ingredients obtained by the GPC method is 95 wt % or more, Mn is 800 or more and 2300 or less, and the ratio of Mw to Mn is 1.0 or more and 1.3 or less. Oil film breakage at the sliding portions of the bushings is suppressed from occurring and the oil film strength is high such that an oil-free chain has a sufficiently long abrasion elongation-resistant life. | 11-18-2010 |
| 20100275571 | OIL-IMPREGNATED BUSHING, OIL-FREE CHAIN AND METHOD FOR MANUFACTURING OIL-IMPREGNATED BUSHING - The oil-free chain is obtained by connecting a pair of inner link plates which are connected by oil-impregnated bushings and a pair of outer link plates, which are connected by pins inserted into adjacent oil-impregnated bushings of adjacent inner link plates alternately. The oil-impregnated bushing is obtained by impregnating a bushing made of a metal sintered body with perfluoropolyether having a kinematic viscosity at 40° C. equal to or higher than 350 mm | 11-04-2010 |
| 20100267504 | CHAIN - In a transmission chain having link plates with convex edges for sliding contact with a guide surface, the plates are asymmetric in shape so that the distance from a line connecting the centers of the connecting holes and the convex edge is greatest at a position other than at the midpoint between the connecting holes. A pivoting action of the link plates takes place as they slide over a guide surface, changing the abutment point. | 10-21-2010 |
| 20100248879 | LUBRICANT COMPOSITION FOR CHAINS, AND CHAIN - A chain is constructed by alternately connecting a pair of outer link plates connected together with pins and a pair of inner link plates connected together with bushings into which adjacent pins of adjacent pairs of outer link plates are inserted. On the outer and inner surfaces of component parts of the chain, a lubricant composition for chains containing 95% to 80% by mass of a lubricant which is liquid at room temperature and 5% to 20% by mass of a wax which is solid at room temperature and having a consistency of from 60 to 475 and a dropping point of from 60° C. to 120° C., is adhered. | 09-30-2010 |
| 20100229469 | OPENING/CLOSING UNIT AND OPENING/CLOSING UNIT FOR VEHICLE WINDOWS - In a structure including rotary gears spaced apart from each other in a radial direction, and chains which are placed to face each other, engage individually with the respective rotary gears and move in an interlocking manner, have flexible chain sections and flexure preventing sections which project from the chain sections and come into engagement with each other at a point located on one end side with respect to an engaged portion where the chains engage with the rotary gears, and are attached at their one ends to a sliding body such as a window glass, the flexure preventing sections are brought into engagement with each other to prevent the chains from flexing in separating directions and join them together to make one end side of the chains a non-flexible portion in the form of an angular bar. | 09-16-2010 |
| 20100223901 | LIFT-DRIVING ENGAGEMENT CHAIN - A lift-driving engagement chain capable of improving buckling strength of a pair of lift-driving engagement chains, by modifying the buckling restricting flat surfaces in order to suppress the force which causes a relative slippage along buckling restricting flat surfaces between hooked inner tooth plates and outer tooth plates that contact each other through the buckling restricting flat surfaces. | 09-09-2010 |
| 20100216581 | SILENT CHAIN TRANSMISSION - In a silent chain transmission, the distance between the centers of front and rear pin holes of each of the inner link plates of the chain is smaller than the length of the smallest chord obtained by dividing, by the number of sprocket teeth, the circumference of a circle having a radius extending from the center of the sprocket to the center of a pin hole of a link plate of the chain when the last-mentioned link plate is fully engaged with the sprocket. | 08-26-2010 |
| 20100216580 | SILENT CHAIN - In a silent chain, cushion pads are provided in the inner flank regions of at least every second link row. These cushion pads restrict inward flexion of the chain and reduce vibration of the free span regions of the chain. The cushion pads can be individual pads each associated with a link plate, or elongated pads each associated with a row of link plates. In either case, side parts protruding toward the outside of the loop formed by the chain can also restrict outward flexion of the chain. | 08-26-2010 |
| 20100173739 | TIMING CHAIN DRIVING SYSTEM - In a timing chain drive, a hybrid driving sprocket, having roller-engaging teeth and side sprocket teeth, cooperates with a hybrid chain having rollers that mesh with the roller-engaging teeth and toothed link plates that mesh with the side sprocket teeth. A driven sprocket from which the chain travels toward the driving sprocket has a cyclically varying tooth pitch that compensates for tension variations due to cyclic variations in the rotational speed of the driving sprocket or to cyclic variations in the load applied to the driven sprocket. The driven sprocket can be a roller sprocket or a hybrid sprocket having roller-engaging teeth and side sprocket teeth for engagement with the teeth on the link plates of the chain. | 07-08-2010 |
| 20100160098 | CHAIN DRIVING SYSTEM - In a timing chain driving system, the tooth pitch of a driven sprocket from which a tension span of the chain travels toward a driving sprocket varies cyclically around the circumference of the driven sprocket and cyclically increases and decreases the effective length of the tension span in synchronism with cyclic variations in the rotational speed of the driving sprocket, thereby moderating fluctuations in chain tension. Marks on the side of the driven sprocket identify the locations at which the tooth pitch is largest and where the tooth pitch is smallest. | 06-24-2010 |
| 20100140572 | ENGAGEMENT CHAIN - There is provided an engagement chain whose driving force per occupied space is increased, whose durability is improved by reducing stress in a direction of bending a connecting pin and whose engagement noise during driving is reduced. The engagement chain includes a large number of outer and inner link plates, each having hook-like portions, which are connected in a chain longitudinal direction by connecting pins, the large number of outer and inner link plates are connected flexibly without gap in the chain width direction while the back surfaces of the link plates opposite to the hook-like portions engage with driving sprockets. | 06-10-2010 |
| 20100137088 | TRANSMISSION CHAIN - The invention provides a transmission chain including inner plates, bushings, outer plates, and a cylindrical hollow pin capable of supplying lubricant oil on a outer circumference of the pin across the whole area of the longitudinal direction of the pin when a chain is in operation, even when the chain is tensioned. | 06-03-2010 |
| 20100137085 | TIMING CHAIN DRIVE SYSTEM - In a timing chain driving system in which the speed of a driving sprocket fluctuates cyclically, the tooth pitch of a driven sprocket from which a tension span of the chain travels toward the driving sprocket varies cyclically around the circumference of the driven sprocket so that the tooth pitch at the point at which the timing chain disengages from the driven sprocket is at a minimum when the rotational speed of the driving sprocket is maximum, moderating fluctuations in chain tension. A similar effect can be achieved in the case of a driving sprocket having a cyclically varying tooth pitch by arranging the driving sprocket so that its tooth pitch is maximum at the point at which it is engaged by the chain when its rotational speed is maximum. | 06-03-2010 |
| 20100120568 | SILENT CHAIN WITH BUSHINGS - A silent chain with bushings comprises outer and inner links interconnected in alternating relationship. Each outer link comprises outer plates and connecting pins press-fit into the pin holes in the outer plates. Each inner link comprises a center guide plate disposed at a location midway between the sides of the chain, and toothed inner link plates on both sides of the center guide plate. Bushings are press-fit into bushing holes in the guide plate and the toothed inner link plates. The connecting pins of the outer links extend through bushings of the adjacent inner links, thereby connecting the outer and inner links of the chain are in alternating relationship. | 05-13-2010 |
| 20100105509 | PULLEY FOR USE WITH TOOTHED BELT - There is provided a pulley for use with a toothed belt capable of reducing the noise generated when the pulley engages with the toothed belt, while reducing the manufacturing costs and time used to manufacture the pulley. The pulley includes a disk whose inner circumference is fitly attached to a rotary shaft. The outer circumference of the pulley has teeth to be engaged with the toothed belt and flanges erected on both sides of the tooth, wherein the flanges have a plurality of through holes that penetrate through the flanges in a direction of the rotary shaft. | 04-29-2010 |
| 20100093475 | CHAIN - In a roller chain or a rollerless bushing chain, each outer link plate is a gourd-shaped plate having, along the direction of elongation of the chain, a narrow middle portion between two end portions larger than the middle portion. The back height of each outer link plate, is smaller than the back height of each of the inner link plates. The area of each cross-section of each outer link plate, on a section plane perpendicular to the direction of chain elongation and passing through the center of a connecting pin, is at least as large as the area of each cross-section of each inner link plate taken on a section plane perpendicular to the direction of chain elongation and passing through the center of a bushing. | 04-15-2010 |
| 20100081528 | SELF-LUBRICATING CHAIN - The invention relates to a self-lubricating chain which includes a connecting pin which is used to connect inner and outer link portions. The connecting pin includes a lubricating hole and a hollow portion where a lubricating oil supply may be disposed and held in place by a lid member, which provides a press fit and tight seal so as to provide a reliable lubricating oil supply and a durable chain which has improved durability. | 04-01-2010 |
| 20100069188 | SILENT CHAIN - In a silent chain having interleaved joint link plates and guide link plates each having a pair of teeth and a pair of pin holes, the pin holes in each of the joint link plate are elongated in the direction of elongation of the chain, and extend toward each other from the two connecting pins extending through the pin holes so that a gap is formed between each of the two connecting pins and the other. The pin holes of each of the toothed guide link plates are circular pin holes. The elongation of the pin holes of the joint link plates allows the joint links to shift longitudinally with respect to the guide link plates on engagement of the chain with a sprocket, reducing clashing noise. | 03-18-2010 |
| 20100059727 | ENGAGEMENT CHAIN TYPE DRIVING DEVICE - The invention relates to an engagement chain type driving device including a pair of driving sprockets, which rotate positively and reversely in opposite directions about a pair of rotating shafts, a pair of engagement chains, which engage with each other by the pair of driving sprockets so to be integrated together, and a driving source, which drives the pair of driving sprockets, wherein the engagement chain includes inner tooth plates and outer tooth plates, which each include buckling limiting flat surfaces, the inner tooth plates and outer tooth plates being brought opposite to each other and into contact with each other when the engagement chains are integrated by the pair of driving sprockets, such that the flat surfaces hold the chain engagement position. | 03-11-2010 |
| 20100051424 | ENGAGEMENT CHAIN - An engagement chain in which a buckling strength of a pair of engagement chains engaged with each other is improved without blocking engagement operations between inner tooth plates and between outer tooth plate. The chain includes inner tooth plates, bushes, outer tooth plates and connecting pins. Buckling limiting flat surfaces of adjoining plates are brought into surface contact with each other when opposing segments of the chain are integrated together by driving sockets. | 03-04-2010 |
| 20100044190 | HOISTING AND LOWERING DRIVING ENGAGEMENT MULTI-ROW CHAIN - Aspects of the invention provide a hoisting and lowering driving engagement multi-row chain in which the weight of the chain is balanced across the chain width direction so as to improve the load balance. This allows the weight of articles to be hoisted and lowered more stably hoisted and at higher positions, and results in an improvement of endurance of the chain, reduction of driving noise, miniaturization of the chain size, while the biasing or deflecting of intermediate tooth plates and inner tooth plates in the chain width direction is suppressed. | 02-25-2010 |
| 20090286642 | CHAIN - The outer link plates of a roller chain or rollerless bushing chain have one or more curved grooves formed by pressing, on their inner faces. The grooves connecting one of two pin holes formed in each plate to the other pin hole. | 11-19-2009 |
| 20090286640 | SPROCKET FOR CHAIN - A sprocket of a chain transmission has at least two different pitch angles arranged irregularly in the direction of the circumference of the sprocket's pitch circle. The diameter of the tooth gap bottom circle of the sprocket is larger than the diameter of tooth gap bottom circle of a standard sprocket having the same number of teeth. The teeth are integrally molded as a part of the sprocket by sintering. | 11-19-2009 |
| 20090286639 | SPROCKET FOR CHAIN - A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller than the standard pitch angle. The number of pitch angles in the sprocket larger than the standard pitch angle is greater than the number of pitch angles in the sprocket smaller than the standard pitch angle. The sprocket teeth are integrally molded with the sprocket by sintering. | 11-19-2009 |
| 20090286634 | CHAIN - In a roller chain or bushing chain, oil introducing holes in a bushing are offset laterally from a central location between the inner link plates, located in close proximity to the inner link plates, but not buried within the holes of the inner link plates in which the bushing is press-fit. | 11-19-2009 |
| 20090260958 | TRACK FRAME ASSEMBLY IN CONVEYOR SYSTEM - A track frame assembly is provided which includes a frame member formed from an elongated metallic channel, a pair of elongated synthetic resin-made track rail members each fixed in place on a predetermined surface of the frame member, and a plurality of rail fixtures with which the pair of track rail members can removably be fixed to the frame member. Each of the track rail members includes a retaining projection having a retaining recess formed therein, the pair of track rail members is disposed for the retaining recesses to be opposite to each other and each chain element of the conveyor chain has a pair of engaging projections which are formed to slide in contact in the respective retaining recesses in the track rail members in pair, thus the conveyor chain being smoothly movable without disengagement from the pair of track rail member. Thus, the track frame assembly can be formed from a reduced number of parts and designed lightweight because of its structural simplicity, is easy to assemble, can retain ample strength and precision, is easy to handle and maintain and inexpensive. | 10-22-2009 |
| 20090247340 | CHAIN TRANSMISSION DEVICE - In a chain transmission, the link plates of a roller chain or rollerless bushing chain are formed with pairs of teeth. A sprocket has a central set of sprocket teeth for meshing with the rollers or bushings, and sets of side sprocket teeth for meshing with the sprocket. The teeth of the link plates function as a silent chain. After an inner flank of a link plate tooth comes into contact with a side sprocket tooth, a roller and an outer flank of the link plate tooth are seated on the sprocket. | 10-01-2009 |
| 20090247337 | CHAIN TRANSMISSION DEVICE - In a chain transmission using a hybrid chain having inner and outer links with bushings, or with bushings and rollers, the rollers mesh with a central sprocket, and the link plates have teeth that function as a silent chain, meshing with side sprockets fixed to the central sprocket. The teeth of the link plates of the inner links have a shape different from that of the teeth of the link plates of the outer links. The outer flanks of the teeth can all have the same shape, and the shape difference can be in the shapes of the inner flanks. | 10-01-2009 |
| 20090247335 | HYDRAULIC TENSIONER - In a hydraulic tensioner having a hollow plunger that cooperates with a housing to form a high pressure oil chamber, the movable element of the check valve that allows oil to flow into the high pressure oil chamber is a bar-like element that extends into a coiled plunger-biasing spring and is biased into engagement with a valve seat by another coiled valve-biasing spring that extends into the plunger-biasing spring. The bar-like element has a larger diameter portion the diameter of which is slightly less than the inner diameter of the plunger-biasing spring, and a smaller diameter portion the diameter of which is slightly less than the inner diameter of the valve-biasing spring. The valve-biasing spring bears against a shoulder at the location at which the smaller and larger-diameter portions of the bar-like element meet. | 10-01-2009 |
| 20090239691 | SILENT CHAIN - The connecting pins of a chain protrude laterally from the chain, and are bent toward the inside of the loop formed by the chain so that they can stir lubricating oil in an oil bath, preventing localized heating and oil deterioration, and so that they can splash oil toward the central part of the chain for enhanced lubrication. | 09-24-2009 |
| 20090209380 | SPROCKET FOR CHAIN - A sprocket for a chain drive using a roller or bushing chain has a plurality of different pitch angles, including both pitch angles larger than the standard pitch angle, and pitch angles smaller than the standard pitch angle. The number of pitch angles in the sprocket larger than the standard pitch angle is greater than the number of pitch angles in the sprocket smaller than the standard pitch angle. | 08-20-2009 |
| 20090209378 | HYDRAULIC TENSIONER - The hollow plunger of a hydraulic tensioner, slidably receives a sleeve that divides the high pressure oil chamber into two parts. The first part is formed by the plunger and a plunger-accommodating hole of the tensioner housing. The second part is formed by the plunger and the sleeve. Two springs, one being in the first part, and the other being in the second part, urge the plunger in the protruding direction. When the second part is filled with oil during ordinary engine operation, a negative pressure in the second part exerts a force opposing protruding movement of the plunger. Therefore, the springs can be made strong enough to prevent excessive chain vibration and noise during engine start-up when the parts of the high pressure oil chamber are not filled with oil, without causing the tensioner to exert excessive force on the chain during ordinary engine operation. | 08-20-2009 |
| 20090209377 | HYDRAULIC TENSIONER - In a hydraulic tensioner having a coiled plunger-biasing spring, the volume of the high pressure oil chamber is reduced by incorporating a bar inside the spring. One of both ends of the spring are formed to block passage of the bar, so that the bar and spring can be installed as a pre-assembled unit, and dropping of the bar out of the spring can be avoided. | 08-20-2009 |
| 20090209376 | HYDRAULIC TENSIONER - In a hydraulic tensioner, at least a part of a bar is located within a coil spring that biases a plunger in the protruding direction. The bar reduces the volume of the high pressure oil chamber of the tensioner. | 08-20-2009 |
| 20090186732 | SILENT CHAIN - In a silent chain having guide rows composed of guide plates, and inner guide row plates, the guide row plates being connected, by connecting pins, in alternating, interleaved relationship with plates of non-guide rows, the diameters of the pin holes in the plates of each non-guide row vary with increasing distance from the guide plates. Optionally the diameters of the inner plates in the guide rows can also vary with increasing distance from the guide plates. | 07-23-2009 |
| 20090186731 | SILENT CHAIN - In a silent chain having guide rows composed of guide plates, and inner guide row plates, and connected, by connecting pins, in alternating, interleaved relationship with plates of non-guide rows, the pitches of the pin holes in the plates of each non-guide row vary with increasing distance from the guide plates. Optionally the pitches of the inner plates in the guide rows can also vary with increasing distance from the guide plates. The pin holes of the non-centrally located non-guide row plates, and optionally, the pin holes of the non-centrally located inner guide row plates, can also be slanted to conform to the surfaces of the connecting pins when the pins are flexed as a result of tensile force applied to the chain. | 07-23-2009 |
| 20090186730 | SILENT CHAIN - In a silent chain, the outer diameter of each connecting pin gradually increases from its ends toward a central region at an intermediate location between its ends, whereby the diameter of each pin is greatest in its central region. The pin holes of the inner plates can have the same inner diameter, which can be slightly larger than the largest outer diameter of the connecting pins. The gradual increase in the outer diameter of each pin is sufficiently small that, when a tensile load is applied to the chain, a connecting pin can be flexed by abutting inner surfaces of the pin holes of the chain's non-guide row plates, by an amount sufficient to make the abutment region of the pin substantially straight and in substantially uniform contact with the abutting inner surfaces of the pin holes. | 07-23-2009 |
| 20090186729 | SILENT CHAIN - In a silent chain, interleaved toothed link plates in guide rows and non-guide rows are articulably connected by connecting pins fixed to guide plates at the outer ends of the guide rows. In each guide row, the connecting pins are bent in such a way that the central portions of the connecting pins are closer to each other than the end portions when the chain is under moderate tension or no tension. As greater tension is applied to the chain, the bent connecting pins become substantially straight and are brought into substantially uniform contact with pin holes in the plates. | 07-23-2009 |
| 20090170648 | TIMING CHAIN DRIVE UNIT - In a timing chain drive unit the tooth pitch of a driven sprocket from which a tension span of the chain travels toward a driving sprocket varies cyclically around the circumference of the driven sprocket and cyclically increases and decreases the length of the tension span in synchronism with load variations imparted to the driven sprocket by a valve-operating camshaft. | 07-02-2009 |
| 20090156339 | CHAIN GUIDE FOR TRANSMISSION DEVICE - In an engine timing transmission, one end of a unitary molded glass fiber-reinforced resin chain guide is pivotally supported on a bolt fixed to an engine block. A supporting portion adjacent the opposite end of the chain guide is in abutting relationship with the engine block. An intermediate supporting portion on the chain guide is spaced from the engine block, but, when tension in the chain increases, the chain guide flexes, allowing the intermediate supporting portion to come into abutting relationship with the engine block. Through holes in the chain guide allow deformation of the supporting portions. | 06-18-2009 |
| 20090149288 | SILENT CHAIN - In a silent chain having interleaved guide rows and joint rows, guide plates at the outer sides of the guide rows are connected by engagement pins which extend through overlapping recesses formed on the outer flanks of the guide row plates, and on the inner flanks of the joint row plates. The engagement pins contact sprocket teeth before the outer flanks of the guide row plates contact the sprocket teeth. Cutouts formed in the guide plates adjacent the engagement pins allow the guide plates to deform and thereby absorb the impact imparted to the engagement pins by the sprocket teeth. | 06-11-2009 |
| 20090143177 | TIMING CHAIN DRIVE UNIT - In an engine timing chain drive, a pivoted chain guide is provided on the tension side of the chain, and a synchronizing sprocket is incorporated into the chain guide and driven by the chain. The synchronizing sprocket rotates a cam which effects reciprocating movement of the guide to compensate for cyclic variations in tension resulting from operation of intake and exhaust valves. | 06-04-2009 |
| 20090131209 | ROCKER JOINT PIN TYPE SILENT CHAIN - In a rocker joint silent chain, the link plates have two different engagement pitches, and the connecting pins are composed of combinations of rocker pins and joint pins, where each rocker pin has one of two thicknesses and each joint pin has one of two thicknesses, so that the rocker joint pins of the chain have three different thicknesses. The link plates and connecting pins are arranged randomly along the length of the chain. | 05-21-2009 |
| 20090111629 | TENSIONER LEVER FOR CHAIN DRIVE - In a spring-loaded tensioner lever having a coiled torsion spring accommodated in a space inside the lever, a stopper mechanism, comprising a pin held removably in a hole in the lever, holds an arm of the torsion spring against movement in the unwinding direction while the lever, or the chain, is being mounted on a mounting surface. The pin and a bent end of the arm of the spring fit into holes in the mounting surface positioned so that a pivot shaft-receiving hole of the lever is automatically aligned with a shaft-mounting hole in the mounting surface. | 04-30-2009 |
| 20090111626 | CHAIN TRANSMISSION FOR USE IN AN ENGINE - In a chain transmission, the guide-contacting portions of inner and outer plates of a chain each comprise a pair of front and rear flat surfaces, an intermediate concave oil-retaining surface and convex connecting surfaces. The lengths of the flat surfaces are such that adjacent flat surfaces of overlapping inner and outer plates overlap even when the plates in contact with the portion of a convex guide surface having the smallest radius of curvature. | 04-30-2009 |
| 20090105024 | CHAIN TRANSMISSION - A hybrid chain comprises outer links composed of link plates connected in side-by-side relationship by two connecting pins fitted to holes in the outer plates, and inner links composed of link plates in spaced, side-by-side relationship and connected by two bushings on which rollers are mounted, the bushings being fitted to holes in the inner plates. The inner and outer links are connected in alternating, overlapping, relationship, with each pin of an outer link extending through a bushing of an adjacent overlapping inner link. The chain meshes with a sprocket composed of a central sprocket engaged by the rollers, and two side sprockets. The inner link plates, the outer link plates, or both, have two teeth, with outer flanks in the form of arcs each centered on the more remote pin or bushing hole. The inner link plates, outer link plates, or both, can be double-sided link plates. | 04-23-2009 |
| 20090105023 | GUIDE FOR TRANSMISSION DEVICE - In an engine timing chain guide composed of a synthetic resin shoe supported on a frame by L-shaped and strip-shaped engagement members integrally molded as unitary parts of the shoe, the L-shaped members are formed with oblique tongues that resiliently engage side edges of the frame member, and the strip-shaped engagement members include surfaces that extend obliquely toward, and resiliently engage, a side edge of the frame member. Laterally extending legs of the L-shaped members are also formed with bulged portions, and the frame member is sandwiched between the bulged portions and a back side of the shoe. | 04-23-2009 |
| 20090075769 | CHAIN GUIDE FOR USE IN ENGINE - Longitudinal grooves having rectangular cross-sections are formed by surface pressing in the front and/or back surfaces of the metal base plate of a chain guide. In the case of a chain guide for a roller chain, the grooves can be positioned so that they are located opposite the parts of the shoe surface that is contacted by the link plates on both sides of the chain. | 03-19-2009 |
| 20090062160 | OILLESS CHAIN AND METHOD OF PRODUCING OILLESS CHAIN - An oilless chain is configured to connect alternately a pair of outer plates having two pins for coupling each other and a pair of inner plates, disposed adjacent to the pair of outer plates, having two bushings for coupling each other, by incorporating one of the pins into one of the bushings. After perfluoropolyether is impregnated into the bushings, the bushings are immersed in a lubricating oil composition prepared by blending perfluoropolyether with polytetrafluoroethylene. The polytetrafluoroethylene has a primary particle diameter adapted to the diameter of the pores of the bushings through which the lubricating oil composition flows. | 03-05-2009 |
| 20090062051 | Silent chain transmission device - In a silent chain, a link plate is formed by punching, followed by simultaneous shearing of the inner surfaces of the pin holes, the inner engagement surfaces of the teeth, the outer engagement surfaces of the teeth, the connecting arc continuous with the inner connecting surfaces, and the back of the link plate over at least 70% of the plate thickness. The plates are arranged at random to form a link, and engage a sprocket first by engagement of an inner engagement surface with a sprocket tooth, and thereafter seat on the sprocket with outer engagement surfaces of the link teeth in engagement with the sprocket teeth. | 03-05-2009 |
| 20090042683 | SILENT CHAIN - In a silent chain, link plates having two different back heights are arranged so that V-shaped oil guiding walls, opening in the direction of chain travel, are formed on the back of the chain that comes into sliding contact with the shoe of a chain guide. | 02-12-2009 |
| 20090036245 | DOUBLE-SIDED ENGAGEMENT TYPE SILENT CHAIN - In a double-sided engagement type silent chain in the form of an endless loop, the outermost link plates of the link rows whose outermost plates are not fixed to the chain's connecting pins, have teeth protruding toward the outside of the loon, and are paired in side-by-side relationship with adjacent inner link plates whose teeth protrude toward the inside of the loop. | 02-05-2009 |
| 20090036242 | CHAIN GUIDE FOR USE IN ENGINE - A chain guide is composed of a resin shoe engageable with an aluminum base frame. The shoe has a hook formed at a chain entry end for engagement with a chain entry end of the base frame, and a C-shaped hook at the chain exit end engageable with a side edge of the base frame. The shoe is engaged with the base by first engaging the C-shaped hook with the side edge of the base frame, then flexing the chain entry end of the shoe until the hook at the chain entry end can receive the chain entry end of the base. The shoe is moved a short distance toward the chain exit end of the base until a projection formed on a back surface of the shoe near the chain entry end snaps into a depression formed on a front surface of the base frame, locking the shoe and base together. | 02-05-2009 |
| 20090036241 | TENSIONER LEVER - In a pivoted tensioner lever extending upward from a pivot axis, both ends of boss through which a pivot shaft extends are provided with funnel-shaped grooves that guide oil adhering to the lever body into a region between the shaft and the inside of the boss. Oil guiding walls, continuous with the boss, and downwardly sloping reinforcing ribs with oil passages formed at their lower ends, increase flow of oil adhering to the lever body to the region between the shaft and the inside of the boss | 02-05-2009 |
| 20090017951 | TRANSMISSION CHAIN FOR USE IN ENGINE - The plates of transmission chain for an engine are formed with a guide-contacting configuration composed of spaced flat surfaces that come into sliding contact with a flat chain guide, and convex surfaces, continuous with and between the flat surfaces, for sliding contact with a convex chain guide. The convex surfaces are connected by a concave surface that, with the guide surface, forms an oil-retaining clearance. The radius of curvature of the convex curved surfaces of the plate preferably increases gradually from the location where they meet the flat surfaces toward the location where they meet the concave surface. The plates can have the same configuration on the side facing the inside of chain loop as on the side facing the outside of the chain loop. | 01-15-2009 |
| 20080318718 | DOWNWARD ANGLE SETTABLE HYDRAULIC TENSIONER - In a hydraulic chain tensioner having a housing, a hollow plunger slidable in a plunger-accommodating hole in the housing, and a hollow sleeve extending into the plunger from a bottom of the plunger-accommodating hole, and a check valve mounted at the opposite end of the sleeve, a passage is provided on the outer surface of the sleeve to accelerate the balance of pressure between a first high pressure chamber between the check valve and the protruding end of the plunger and a second high pressure chamber between the inner end of the plunger and the bottom of the plunger-accommodating hole. In an alternative embodiment, balance is accelerated by communication between the second high pressure chamber and an oil reservoir inside the sleeve on the upstream side of the check valve. | 12-25-2008 |
| 20080318717 | HYDRAULIC TENSIONER - A hydraulic tensioner comprises a plunger, and a plunger-accommodating hole in a tensioner housing, together forming a high pressure oil chamber. A plunger-biasing spring is provided in the high pressure oil chamber between the plunger and the bottom of the plunger-accommodating hole. An oil storage chamber is formed inside the plunger, and a check valve unit is press-fit in the rear end of the plunger to allow flow from the oil storage chamber to the high pressure oil chamber while blocking reverse flow of oil. | 12-25-2008 |
| 20080312019 | SILENT CHAIN TRANSMISSION DEVICE - In a silent chain transmission, a silent chain composed of uniform link plates meshes with a sprocket having two or three kinds of teeth randomly distributed around its circumference. The teeth have a common tooth gap bottom diameter, and a uniform angular spacing, but have different heights and different tooth forms. | 12-18-2008 |
| 20080287237 | OIL-FREE CHAIN - In an oil-free roller chain, the inner faces of the outer link plates have recesses that receive the ends of bushings, and the inner faces of the inner link plates have recesses that receive the ends of rollers surrounding the bushings. Each such recess is formed by punching, so that the outer surface of each plate has a bulged portion opposite each recess. The diameters of the bulged portions are greater than the diameters of the corresponding recesses. The bushing can have an oil passage located midway between its ends and serving as an oil reservoir supplying oil to the gap between the bushing and the roller and between the bushing and a connecting pin. | 11-20-2008 |
| 20080280716 | CHAIN FOR USE IN AUTOMOBILE ENGINE - In a roller chain or a rollerless bushing chain, the surfaces of the pins of the chain are covered with a chromium carbide layer or a vanadium carbide layer, the bushings are formed by cold forging, and the surface roughness of the pins is smaller than the surface roughness of the bushings. | 11-13-2008 |
| 20080261737 | Hydraulic tensioner - A check valve unit in a hydraulic tensioner comprises a check ball, a steel ball guide having an inner wall allowing a limited range of longitudinal movement of the ball but restricting its lateral movement, a steel retainer attached to the high pressure oil chamber side of the ball guide, and a steel ball seat attached to the oil supply side of the ball guide. Bulged portions formed on an outer surface of the ball guide are press-fit into the plunger-accommodating hole of the tensioner. | 10-23-2008 |
| 20080248908 | Silent chain - In a silent chain comprising interleaved and relatively pivotable rows of link plates, protrusions formed in the link plates contact relatively pivotable link plates in adjacent rows so that the area of contact is reduced. The protrusions can be annular, or they can be in the form of arcs that are of a size and position such that the arcuate protrusions of each plate do not interfere with the arcuate protrusions of an adjacent plate as the chain bends during use. The plates can have rectangular protrusions, or arcuate protrusions each consisting of an arc-shaped collection of dot-shaped protrusions. | 10-09-2008 |
| 20080220918 | Downward angle settable hydraulic tensioner - The hollow plunger of a hydraulic tensioner for an engine timing chain protrudes from a tensioner housing in an oblique downward direction. An inner sleeve fixed to the housing slidably protrudes into the interior of the plunger, and has a ball check valve at its protruding end. Oil is supplied though the sleeve and the check valve to a high pressure oil chamber formed inside the plunger, and flows outward through a two-part leakage path formed by a gap between the sleeve and the interior of the plunger and a gap between the exterior of the plunger and an interior wall of a plunger-accommodating hole in the housing. Any air that enters the tensioner accumulates in a region surrounding the upper end of the sleeve, rather than in the high oil pressure chamber inside the plunger. | 09-11-2008 |
| 20080207366 | TENSIONER - To reduce seizing in a tensioner having a plunger slidable in a plunger-accommodating hole of a tensioner housing and biased in the projecting direction, the tensioner housing is formed of a hyper-eutectic Al—Si series alloy containing Si in the range from 14 to 16 weight % and having a particle diameter of proeutectic Si in the range from 20 to 30 μm. | 08-28-2008 |
| 20080207365 | Hydraulic tensioner - In the check valve of a hydraulic tensioner, a bell-shaped retainer is provided with plural, branched, leg portions which resiliently grip the outer surface of a ball seat. Oil induction slots are formed between adjacent branched leg portions of the retainer to provide oil flow paths that are unimpeded by the plunger-biasing spring of the tensioner. | 08-28-2008 |
