Class / Patent application number | Description | Number of patent applications / Date published |
192850170 | Piston and cylinder operator rotating with clutch input or output | 32 |
20100243401 | SHIFTING ELEMENT OF A GEAR BOX - A shifting element of an automatic transmission with a shifting element piston that can be hydraulically actuated via an engaging pressure space and with a way of pressure compensation which compensates for dynamic engagement forces that act on the shifting element piston and are produced in the engaging pressure space filled with hydraulic liquid by its rotation. The way of pressure compensation comprising of at least one pressure compensation space that can be fed with pressure compensation liquid in which dynamic compensation forces, directed opposite to the dynamic engagement forces, can be produced by virtue of the rotation. To achieve effective passive compensation of dynamic hydraulic pressures with comparatively little radial structural space occupation, at least two pressure compensation spaces, opposite the engaging pressure space, are arranged in a cylinder space of the shifting element piston axially next to one another. | 09-30-2010 |
20120145511 | CENTRIFUGALLY BALANCED HYDRAULIC CLUTCH ASSEMBLY - A centrifugally balanced hydraulic clutch assembly includes a hydraulic chamber configured to rotate about an axis of rotation and a clutch piston that is partially situated within the hydraulic chamber and defines both an apply volume and a release volume. The clutch piston includes an inner surface and an outer surface, where a portion of the outer surface faces the apply volume and defines an apply area, and a portion of the inner surface faces the release volume and defines a release area. Additionally each portion of the apply area is provided at a respective distance from the axis of rotation, and, for each portion of the apply area, there is a corresponding portion of the release area provided at the same radial distance. | 06-14-2012 |
20120193187 | VEHICLE DRIVE DEVICE - A vehicle drive device has an engine, a transmission, a clutch device and a clutch operating mechanism which operates the clutch device to drivingly connect the engine to the transmission. The clutch operating mechanism has a clutch drum secured to the outer circumferential surface of an input shaft of the transmission and holding a second clutch section which is engageable with a first clutch section held on an input member of the clutch device to which a driving power of the engine is transmitted. The clutch drum has a drum chamber, a fixed plate closing an opening of the drum chamber, a piston surrounded by the clutch drum and partitioning the drum chamber into a hydraulic chamber and a spring chamber, and an urging element provided inside the spring chamber to be surrounded by the clutch drum and urging the piston. | 08-02-2012 |
20120298468 | Piston Actuated Split Input Transmission Synchronizer - A piston actuated synchronizer system for a split torque transmission where the piston is attached directly to the synchronizer shift collar on the synchronizer centerline to provide the required actuation in a small volume of space and resolve fork and rod deflection issues seen on other synchronizers that use such a system. The piston is pressure applied and spring released. This design also uses a displacement sensor to monitor synchronizer engagement. | 11-29-2012 |
20130161146 | TWO STAGE PISTON FOR FASTER CLUTCH APPLY - A clutch assembly, including: a secondary piston assembly; a primary piston including a portion located radially outward of the secondary piston assembly; a first chamber at least partially formed by a first side of the primary piston; a second chamber at least partially formed by the secondary piston assembly and a second side of the primary piston; and a check valve connecting the first and second chambers. For a first force applied by fluid in the first chamber: the primary piston remains axially stationary; the fluid flows from the first chamber into the second chamber; and the secondary piston assembly displaces in a first axial direction to contact a clutch pack. For an increase of the first force to a second force: fluid flow between the first and second chambers is blocked by the check valve; and the primary piston and the secondary piston assembly displace in the first axial direction to close the clutch pack. | 06-27-2013 |
20130206538 | Actuator Seal with Lubricating Gaps - A seal is for sealing a clearance space between first and second members disposed generally coaxially about an axis, one of the two members being linearly displaceable generally along the axis relative to the other one of the two members. The seal includes a generally annular body coupled with the first member, the body having a centerline generally coaxial with the central axis, a sealing surface extending circumferentially about the axis, and a plurality of projections extending generally radially from the sealing surface and into contact with the second member. The projections are spaced circumferentially about the axis so as to define a separate lubrication gap between each pair of adjacent projections. The body is configured to radially deflect when exposed to at least a predetermined fluid pressure such that recessed sections of the sealing surface extending between the projections contact the second member to substantially obstruct the clearance space. | 08-15-2013 |
20130277167 | DRIVING FORCE TRANSMISSION APPARATUS - In a driving force transmission apparatus, an oil inlet portion for introducing hydraulic fluid from one of spaces to the other one of the spaces is formed, and an apparatus case has an oil outlet portion for delivering the hydraulic fluid from the other one of the spaces to an outside of the other one of the spaces with an oil delivery capacity lower than an oil introducing capacity of the oil inlet portion. A pressure regulation valve for bringing the oil inlet portion into an open state upon reception of hydraulic pressure higher than or equal to a predetermined pressure from hydraulic fluid is arranged at the oil inlet portion. | 10-24-2013 |
20130299300 | COOL LOGIC WITH AN INTEGRATED COOLER INTO THE CLUTCH/ENGINE BASE - A fan drive system is provided having a housing connected with a pulley. A fan shaft is rotatably mounted to the housing by a clutch. A piston actuates the clutch. A pressure tube is provided for delivering pressure to the piston. A valve controls pressure against the piston. A fixed shaft rotatably supports the housing and the pulley and has passages extending through the pulley. A base connects the support shaft to a vehicle structure. An oil plate has inlets and outlets with the shaft passages. The oil plate circulates the hydraulic fluid. A coolant plate is juxtaposed between the oil plate and the structure supporting the support shaft. The coolant plate has inlets and outlets for coolant from a remote cooler. | 11-14-2013 |
20130334003 | ADJUSTABLE HYDRAULIC SLAVE CYLINDER FOR CLUTCH INCORPORATING A SPRING BIASED PRESSURE PLATE - A novel adjustable slave cylinder is disclosed. The improved slave cylinder is particularly well suited for use with a clutch incorporating an expanding friction disk. The adjustable slave cylinder provides a means for adjusting a clutch pressure plate's position via an adjustment mechanism external to the inside of an engine. | 12-19-2013 |
20140216884 | DRIVE ASSEMBLY FOR A CLUTCH UNIT AND REMOVABLE TRANSIMISSION EQUIPPED WITH SAID ASSEMBLY - A drive assembly having an actuating piston for generating a thrust for engagement of a clutch unit. The assembly also has a bearing for transferring the engagement thrust and a pusher for discharging the engagement thrust onto the clutch unit. The actuating piston, the bearing and the pusher are assembled in succession on a transmission shaft carrying the clutch unit. A chamber is provided for supplying a fluid under pressure for generating a disengagement thrust acting on the actuating piston. At least one preloaded spring is provided that acts on the actuating piston so as to push it towards the clutch unit. The bearing for transferring the thrust is mounted with play directly on the transmission shaft. The pusher being disk-shaped and comprising a first face in lateral contact with the bearing and a second face in lateral contact with the clutch unit. | 08-07-2014 |
20140299439 | ACTUATOR DEVICE FOR ACTUATING A COUPLING MECHANISM - An actuator device for actuating a coupling mechanism or a transmission in a drive wheel in a belt drive or chain drive, includes a shaft, releasably connectable to the drive wheel and at least partially hollow, a push rod connected to the coupling mechanism or transmission and displaceable coaxially to the longitudinal axis of the shaft, a housing having an internal bore for at least partially receiving the shaft, and at least one first bearing disposed in the internal bore of the housing for rotatably supporting the shaft. The actuator device constitutes a fluidic actuator having at least one first pressure chamber capable of being pressurized with a fluid. | 10-09-2014 |
20140332337 | CLUTCH CONTROL DEVICE - The present invention relates to a clutch control device, more particularly, to a clutch control device wherein a mechanical section may be miniaturized and operational errors can be reduced using a non-contact type displacement detection system which uses a linear distance sensor for a clutch clearance and the position of the mechanical section can be accurately controlled by using a plurality of solenoid valves. | 11-13-2014 |
20150136560 | HYDRAULIC PISTON SYSTEM - A hydraulic piston system includes a housing that defines a piston pocket and a fluid inlet. A piston with a peripheral region and an end is movable within the piston pocket of the housing. The end of the piston has peripheral defined channels and a portion structured and arranged to engage the housing to limit travel of the piston. Further, a seal is configured to seal the peripheral region of the piston against the piston pocket. The seal is structured and arranged to receive fluid pressure when the piston is positioned with the portion of the piston is in engagement with the housing and fluid communication exists between the fluid inlet and the seal through the peripheral defined channels. | 05-21-2015 |
192850180 | Positive clutch | 1 |
20120085616 | ARRANGEMENT COMPRISING AT LEAST ONE DOG CLUTCH - An arrangement comprising at least one dog clutch which is shiftable for coupling and decoupling a shaft and a component at a transmission. An actuating piston ( | 04-12-2012 |
192850190 | Friction clutch | 18 |
20100294614 | HYDRAULIC ASSEMBLY FOR A FORCE-OPERATED SETTING UNIT - The disclosure relates to a hydraulic assembly for actuating a setting unit in a motor vehicle. The hydraulic assembly comprises at least one hydraulic actuating unit which acts on the setting unit, as well as at least one piston pump with a piston which is displaceably positioned in a housing, wherein, when the piston moves, there is built up a hydraulic pressure for loading the actuating unit. There is provided a driveshaft with an axis of rotation and an eccentric, wherein the eccentric acts on the piston of the at least one piston pump and, when the driveshaft rotates, builds up a hydraulic pressure. Furthermore, the disclosure relates to a coupling assembly with an inventive hydraulic assembly. | 11-25-2010 |
20130075221 | APPARATUS AND METHOD FOR AUTOMATED TRANSMISSION CLUTCH FILL DURING ENGINE START-STOP OPERATION - An apparatus and a method for engaging a friction element, e.g., a clutch, in an automatic transmission. The apparatus includes a piston contained within a housing that is used to apply pressure to and operate the friction element. The piston divides the housing into first and second chambers that are supplied with fluid by various valves. The pressure of the fluid in the chambers controls the position of the piston. | 03-28-2013 |
20130192948 | DRIVETRAIN-CLUTCH ARRANGEMENT AND FLUID CYLINDER THEREFOR - Fluid cylinder for activating an element of a drivetrain of a motor vehicle. The fluid cylinder has a cylinder housing and a piston. The piston is sealed off from the cylinder housing by means of a piston seal. At least one fluid chamber is formed between the cylinder housing and the piston, which fluid chamber can be connected via at least a first fluid connection to a fluid supply device. The piston in a piston stop position rests against a stop surface of the cylinder housing. The first fluid connection is formed in the region of the stop surface of the cylinder housing. The piston is connected to a sealing device which seals off the first fluid connection in the piston stop position. | 08-01-2013 |
20140332338 | CLUTCH AND CORRESPONDING MOTOR VEHICLE - A clutch, in particular for a motor vehicle, for transmitting torque from an input shaft to an output shaft, includes a wet chamber which is at least partially filled with a cooling medium, and at least one piston, the piston and a component located opposite the piston being rotatable around an axis, and the piston being movable in the direction of the axis to disengage and engage the clutch, is characterized in that on at least one of the following elements: | 11-13-2014 |
20150122609 | CLUTCH PACK RELEASE SPRING ENGAGED WITH INNER RACE - A clutch assembly for a motor vehicle drive train is provided. The clutch assembly includes a clutch pack; a piston for engaging the clutch pack; a housing including a surface for slidably supporting the piston; a release spring for disengaging the piston from the clutch; and a bearing supporting the clutch pack. The bearing limiting axial movement of the release spring away from the piston. A method of assembling a clutch assembly is also provided. | 05-07-2015 |
192850200 | Having friction elements movable axially only | 13 |
192850210 | Having conical or frustoconical friction surfaces (e.g., cone clutch) | 1 |
20130140128 | Pneumatic Clutch With Improved Friction Member - A clutch assembly comprising a clutch housing, a central piston chamber positioned therein and a translatable clutch piston movable between a piston neutral and activated positions in response to air pressure. A rotating drive shaft member is positioned within the clutch housing. A cone clutch friction member is moved from a clutch engaged position to a clutch disengaged position in response to the translatable clutch piston moving between the piston neutral and activated positions. The cone clutch friction member engages the rotating drive shaft when in the clutch engaged position. A clutch spring biases the cone clutch friction member into the clutch engaged position with a clutch engagement force. The cone clutch friction member comprises a V-shaped member with a hollow or solid core, or a bent metal member. Friction material is positioned on at least the surfaces which engage and make contact with the rotating drive shaft member. | 06-06-2013 |
192850230 | Having flat friction surfaces | 12 |
20110259702 | Clutch Arrangement, In Particular For The Drive Train Of A Vehicle - A clutch arrangement includes a housing filled with fluid, a first friction surface formation rotatable with the housing around an axis of rotation, a second friction surface formation rotatable with a driven element around the axis of rotation, a pressing element rotatable with the housing around the axis of rotation and which divides an interior space of the housing into a first spatial area and a second spatial area. Depending on fluid pressure in the first and fluid pressure in the second spatial areas, the pressing element is movable with respect to the housing for producing and canceling a frictional engagement between the and the second friction surface formations. A fluid supply system for the first spatial area and/or the second spatial area includes at least a first fluid flow path. The fluid can be supplied to the associated spatial area via at least one fluid flow path and fluid can be removed from the associated spatial area via at least one fluid flow path. | 10-27-2011 |
20120061202 | TRANSMISSION PISTON WITH CONTAINED RETURN SPRING - A subassembly for a transmission including a seal having a protrusion, a piston including a tab, and a lip about said piston, wherein an axial gap is formed between said tab and said lip, said piston also including a hole corresponding to said protrusion and operatively arranged to receive said protrusion for securing seal to said piston, a spring element disposed in said axial gap between said tab and said lip, wherein said spring element includes a finger corresponding to said tab, wherein said finger is aligned with said tab for axially locking said spring element between said tab and said lip, and wherein said tab includes a recess operatively arranged for receiving said finger for rotationally locking said spring element to said piston. | 03-15-2012 |
20120138412 | CONTROL DEVICE OF A ROTATING SHIFTING ELEMENT OF AN AUTOMATIC TRANSMISSION FOR ENGINE START-STOP OPERATION - A device for controlling a rotating shifting element of an automatic transmission for a start/stop operation. The shifting element is actuated by an axially moving piston which is biased, in a disengaging direction, by a spring and biased, in an engaging direction, by hydraulic pressure supplied to a pressure space. At least one spring-loaded latch, which able to move in the radial direction, is arranged in the pressure space. The spring-loaded latch, when the combustion engine is running, rotates with the piston and acts upon the piston such that if the engine stops, the previously engaged shifting element is locked by spring force and, as the pressure decreases, the shifting element disengages slightly, at most only slightly, and when the engine is re-started, the locking action is again released by centrifugal force, in opposition to the spring force, so that the piston remains engaged by the hydraulic pressure build-up in the pressure chamber. | 06-07-2012 |
20130270057 | HYDRAULIC CLUTCH ASSEMBLY AND METHOD OF PROVIDING HYDRAULIC FLUID TO A HYDRAULIC CLUTCH ASSEMBLY - A hydraulic clutch assembly includes a plurality of frictional clutch discs moveable between an engaged condition and a disengaged condition, wherein the engaged condition provides a transfer of rotational energy. Also included is a first toroidal hydraulic chamber configured to depress the plurality of frictional clutch discs into the engaged condition. Further included is a second toroidal hydraulic chamber opposing the first toroidal hydraulic chamber, wherein the second toroidal hydraulic chamber is configured to balance centrifugal expansion forces of the first toroidal hydraulic chamber. Yet further included is a lubrication circuit for supplying a hydraulic fluid from a fluid reservoir to the second toroidal hydraulic chamber and the plurality of frictional clutch discs, wherein the second toroidal hydraulic chamber is substantially filled prior to delivery of the hydraulic fluid to the plurality of frictional clutch discs. | 10-17-2013 |
20130284557 | VEHICLE DRIVING FORCE TRANSMISSION DEVICE - Leakage oil from a hydraulic actuator operating a dry clutch is prevented from leaking into a dry space where the dry clutch is placed. A space formed by the back surface of a piston of a hydraulic actuator, a coupling plate, and a cylinder portion is sealed by a first seal portion and a second seal portion. Oil leaked from a hydraulic oil chamber through the piston is stored in the space, and is returned to a wet space in a case through an oil passage. | 10-31-2013 |
192850240 | More than two friction elements | 7 |
20140262676 | DRIVING FORCE TRANSMITTING APPARATUS - A driving force transmitting apparatus includes a rotating shaft, a frictional engagement device, a piston member, a piston housing, a piston chamber, an oil pressure sensor, an attachment hole, an operating-oil receiving chamber, a bubble removing chamber, and a bubble discharging groove. The rotating shaft has an axial direction and is rotatable around the axial direction. The frictional engagement device includes a frictional engagement unit which is disposed around the rotating shaft and which includes first and second friction members that are alternately stacked in the axial direction. The piston member is movable in the axial direction to press the frictional engagement unit so that the first and second friction members are engaged with each other. The piston housing contains the piston member. The piston chamber is defined between an inner surface of the piston housing and the piston member. | 09-18-2014 |
192850250 | Including balance chamber | 2 |
20110203896 | Balanced Clutch System - A balanced clutch system is provided for use in a transmission. The balanced clutch system includes a clutch assembly that has a clutch piston and a balance piston that cooperate with a clutch piston cavity and a balance piston cavity. Each of the clutch piston cavity and balance piston cavity receives a continuous supply of fluid and establishes a centrifugal head pressure therein, during use. The centrifugal head pressure established in the balance piston cavity contributes to a force that opposes a self-engaging tendency of the clutch assembly that is created by the centrifugal head pressure established within the clutch piston cavity. | 08-25-2011 |
20130081920 | HYDRAULIC CLUTCH - A hydraulic clutch apparatus includes a first hub, wherein the first hub includes a plurality of frictional clutch discs arranged therein, and a second hub arranged within the first hub and proximate the plurality of frictional clutch discs, wherein the second hub includes a first toroidal hydraulic chamber configured to depress the plurality of frictional clutch discs and a second toroidal hydraulic chamber opposing the first toroidal hydraulic chamber. | 04-04-2013 |
192850390 | Spring released clutch | 3 |
20100108459 | MULTIPLE DISC CLUTCH APPARATUS - A multiple disc clutch apparatus can comprise a plurality of driving clutch plates spline-fitted axially slidably on an input member rotated by a driving source, a plurality of driven clutch plates arranged alternately with the driving clutch plates and spline-fitted axially slidably on an output member, a clutch piston having one surface facing toward an oil pressure chamber and the other surface facing toward the driving clutch plates or driven clutch plates and adapted to be displaced toward a clutch-on side by supplying oil to the oil pressure chamber to pressure-contact the driving clutch plates and driven clutch plates each other so as to transmit a driving force of the input member to the output member and also adapted to be returned toward a clutch-off side by discharging the oil in the oil pressure chamber to separate the driving and driven clutch plates and from each other so as to cut off the transmission of driving force from the input member to the output member. A valve can be pass through the one surface and the other surface of the clutch piston and can be adapted to occupy a closed condition for preventing the oil from flowing from the oil pressure chamber to the side of other surface of the clutch piston when the clutch apparatus is clutched-on and also adapted to occupy an opened condition for allowing flow of air from the side of other surface to the oil pressure chamber when the clutch apparatus is clutched-off. One or more recess for weight reduction can be formed on the one surface of the clutch piston at a position near to the outer circumference “a” further radially outward than the valve. | 05-06-2010 |
20130168197 | DRIVING FORCE TRANSMISSION DEVICE - A hybrid driving force transmission device is provided with a multiple-plate dry clutch, a piston, a piston arm, a return spring, bellows elastic seal components and an arm fixing plate. The return spring applies biasing force to the piston arm in the release direction of the clutch, during the release period of the multiple-plate dry clutch. The bellows elastic seal member is secured or maintained in a position on the side wall of a clutch drum and seals a through hole and arm distal end from the clutch chamber, and undergoes an elastic deformation following the stroke movement of the arm distal end. The arm fixing plate is integrally provided with the bellows elastic seal member, is fixed to the arm distal end, and when the multiple-plate dry clutch is engaged, is configured to contact the clutch plate for transferring the clutch engagement force. | 07-04-2013 |
20130206539 | TRANSMISSION SHIFTING ELEMENT DECELERATOR - A transmission may include gears and a clutch to allow the transfer of torque, at a variety of gear ratios, between an input shaft and an output shaft. The clutch may include a cushion piston to decrease the velocity of a transmission piston before the transmission piston engages a clutch element. The cushion piston may be contained within the transmission piston and configured so the cushion piston ceases movement toward the clutch element before the transmission piston. The pistons may be coupled together such that the cushion piston may resist movement of transmission piston toward the clutch element. | 08-15-2013 |
192850440 | Having particular piston seal | 1 |
20100200355 | Seal Structure - A seal structure provided in an inner mechanism of an automatic shift gear includes: a housing; a piston; a canceller; a return spring; an opponent member which is disposed opposite to a centrifugal canceller chamber in the canceller and forms an oil path between the opponent member and the canceller; an outer circumferential seal unit which is provided on an outer circumferential portion of the canceller and comes into contact with the piston to seal an operating oil supplied to the canceller chamber; and a second outer circumferential seal unit which is provided on the outer circumferential portion of the canceller and comes into contact with the opponent member to seal an operating oil flowing through the oil path, in which the second circumferential seal unit has an axial seal shape which comes into contact with an inner circumferential shape of a cylindrical shape provided on the opponent member. | 08-12-2010 |