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Expansible chamber devices

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Class / Patent application numberDescriptionNumber of patent applications / Date published
092172000 PISTON 143
092169100 CYLINDER DETAIL 71
092165000 WITH GUIDE OR SEAL ON CYLINDER END PORTION FOR PISTON OR MEMBER MOVED BY PISTON 42
092120100 DISPLACEMENT CONTROL OF PLURAL CYLINDERS ARRANGED IN PARALLEL, RADIAL, OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS 42
092061000 RELATIVELY MOVABLE WORKING MEMBERS 36
092153000 WITH LUBRICATING MEANS 28
092005000 WITH (1) SIGNAL OR INDICATOR OR (2) INSPECTION WINDOW IN EXPANSIBLE CHAMBER WALL PORTION 26
092089000 COLLAPSIBLE CHAMBER WALL PORTION (E.G., HINGED OR FLEXIBLE WALL) 25
092015000 WITH RELEASABLE STOP OR LATCH MEANS TO PREVENT MOVEMENT OF WORKING MEMBER 17
092140000 WITH LINKAGE OR TRANSMISSION HAVING RELATIVELY MOVABLE MEMBERS 16
092163000 FLUID CONDUIT OR PORT IN FIXED WALL OF WORKING CHAMBER 13
092130000 WITH SEPARATE BIASING MEANS FOR WORKING MEMBER 11
092161000 WITH SUPPORT OR FRAME (146) 10
092031000 RECTILINEARLY MOVING WORKING MEMBER AND COAXIAL OR PARALLEL ELEMENT SLIDABLY INTERENGAGED FOR RELATIVE ROTARY MOVEMENT 9
092146000 PLURAL UNITARILY MOUNTED CYLINDERS OR FRAME THEREFOR (161) 8
092034000 BELLOWS TYPE EXPANSIBLE CHAMBER 8
092120000 OSCILLATING WORKING MEMBER OR CYLINDER THEREFOR 8
092054000 ROTATING CYLINDER 7
092143000 WITH MOVEMENT DAMPING MEANS (E.G., FLUID FLOW RESTRICTOR) 6
092109000 PISTON WITH RIGID AXIALLY EXTENDING HOLLOW STEM 6
092145000 COMBINED 5
20110271831WATER DEFLECTOR FOR A MUD PUMP - A deflector preventing contamination of an oil sump by water is provided, comprising a collar frictionally locking about a cylinder liner end of the mud pump, a manifold having a tube directing water against a piston and connecting rod contained within the cylinder liner, and a shield extending across an upper portion of the cylinder liner end. The deflector may be attached to cylinder liners with or without modification. A method is provided for deflecting water being forcibly expelled from a horizontal cylinder by a piston stroke, comprising steps of positioning a shield across an upper portion of the cylinder liner end, arranging a tube to spray water against the piston, forcibly spraying water against the piston, allowing the water expelled from the cylinder liner to flow into a water reservoir under the influence of gravity, and deflecting the water into the water reservoir as it is forcibly expelled.11-10-2011
20090178554Piston-Cylinder Unit - A piston-cylinder unit for pivoting a flap with respect to a motor vehicle body includes a cylinder having an open end with a seal, a closed end, and an interior space between the ends; a piston unit axially movable in the cylinder, the piston unit dividing the interior space into a first working space and a second working space; a piston rod connected to the piston unit and extending through the first working space and the seal; and flow connections connecting the first working space to the second working space. A switch element arranged outside the cylinder is switched in response to movement of the piston with respect to the cylinder.07-16-2009
20120031265INFLATABLE PAD HAVING REINFORCING BELTS - An inflatable pad includes: an inflatable pad body having a looped surrounding layer interconnecting top and bottom layers to cooperatively define an inflatable space; and a reinforcing belt unit disposed in the inflatable space in the inflatable pad body and connected between the top and bottom layers of the inflatable pad body. The reinforcing belt unit includes two coupling belts and a main reinforcing belt. Each coupling belt is attached fixedly and partially to a corresponding one of the top and bottom layers of the inflatable pad body, and has a central portion that is spaced apart from the corresponding one of the top and bottom layers of the inflatable pad body and that is connected to a corresponding one of opposite looped end portions of the main reinforcing belt.02-09-2012
20130139681TELESCOPIC ACTUATOR - The subject matter of this invention is a telescopic actuator with tubular cylinders which at the same time function as pistons, used to move/shift/translocate pieces of devices especially while emergency opening damaged movable elements/components. It has a bushing body (06-06-2013
20130186266AIR PUMP - An air pump has a body, a piston rod and a handle. The piston rod is movably inserted into the body and has a rod body, a convex ring and a first engaging part. The convex ring is laterally protruded from the rod body and has a retaining surface. The first engaging part is longitudinally mounted on the convex ring. The handle is mounted on the rod body and has a fixation trough, a retaining ring and a second engaging part. The retaining ring abuts against the retaining surface of the convex ring for preventing a relative rotation between the handle and the piston rod. The second engaging part is longitudinally mounted on the inner surface of the fixation trough and is engaged with the first engaging part of the piston rod. Therefore, the air pump increases the stability between the piston rod and the handle.07-25-2013
092082000 WITH MEANS TO CONTROL FLUID FLOW FROM NON-WORKING CHAMBER 5
20090178553COMPRESSOR - The compressor of the present invention has a structure in which a groove is disposed on a sealing surface of at least one of the head and the valve plate. The structure enhances contact pressure on a pressed surface, providing the gasket with preferable sealing strength. Besides, the head of the compressor has no protrusion on the edge. This eliminates worry about breakage of the head, providing high reliability and productivity.07-16-2009
20090133574Ballistically Tolerant Linear Hydraulic Actuator - A hydraulic actuator has an armored section having concentric cylinders and an unarmored section having a cylinder with a frangible piston and a frangible upper gland nut. The hydraulic actuator may have leakage vents adapted to prevent leakage between hydraulic systems used to power the cylinders. The hydraulic actuator also may have a gland seal for sealing an end of the cylinder of the unarmored section and a sensing port adapted for allowing detection of fluid leaking due to damage of the gland seal.05-28-2009
20110232477ENGINE COMPONENT INCLUDING BREATHER APPARATUS, AND ENGINE BODY INCORPORATING SAME - An engine body includes a crankcase with a crank chamber therein, a cylinder block attached to the crankcase, and a breather passage which selectively permits fluid communication between the crank chamber and an area outside of the crank chamber. The engine body includes a one-way valve between the crank chamber and the breather passage, which allows a one-way flow of gases from the crank chamber to the breather passage. The one-way valve is pressure-operated and is operatively attached to a side wall of the engine body proximate a cylinder sleeve. The one-way valve may be mounted in a mounting window in a side wall of the crankcase, and a timing chamber may function as the breather passage. In an illustrative embodiment, the one-way valve includes a base plate having a valve hole formed therein, and a flexible reed valve plate with one end affixed to the base plate.09-29-2011
20130098240PRESSURE CYLINDER HAVING A HIDDEN LOOP DESIGN - A pressure cylinder includes a pressure-boosting member set, an actuation member set, and a cylinder body, which defines two transversely extending air inlets, two transversely extending air outlets and two air passages respectively axially connected between the two air inlets and the two air outlets for allowing an applied compressed gas to flow through the two air inlets and the two air passages and the two air outlets into an air chamber in the cylinder body to move the pressure-boosting member set and the actuation member set in an oil accumulation chamber in the cylinder body. The hidden loop design for guiding the applied compressed gas does not require any extra pipelines and connectors, avoiding pipeline deterioration or connector loosening problems.04-25-2013
20130192454CONTROL DEVICE FOR A RESERVOIR CHARGING PUMP OF THE BRAKING SYSTEM OF A VEHICLE AND METHOD FOR OPERATING A RESERVOIR CHARGING PUMP OF THE BRAKING SYSTEM OF A VEHICLE - A control device for a reservoir charging pump of a braking system of a vehicle includes: an actuating device designed to actuate the reservoir charging pump into at least one normal mode having a normal rotational speed, and a receiving device designed to receive a variable provided by a vehicle-specific component with respect to a supply voltage provided to the reservoir charging pump. The actuating device is additionally designed to ascertain whether the variable received lies outside a normal value range that is specified for the normal mode, and, if necessary, to actuate the reservoir charging pump from the normal mode into at least one deviation mode having at least one setpoint rotational speed deviating from the normal rotational speed.08-01-2013
092051000 MUTUALLY RELATIVELY MOVABLE CYLINDER OR SLEEVE, MEMBER SEALINGLY SLIDABLE THEREIN AND OUTER CYLINDER THEREFOR 5
20130098238OIL-GAS SEPARATED PRESSURE CYLINDER - An oil-gas separated pressure cylinder, which combines a hydraulic cylinder, a pneumatic cylinder and a pres-pressure cylinder, and keeps the applied compressed gas and the storage hydraulic fluid apart, maintaining the quality of the hydraulic fluid and saving the hydraulic fluid replacement cost. When the applied compressed gas enters the pre-pressure cylinder to move a pre-pressure cylinder piston in forcing the storage hydraulic fluid out of an oil storage space of the pre-pressure cylinder into an oil storage space in the hydraulic cylinder, a hydraulic cylinder piston of the hydraulic cylinder is then forced by the hydraulic fluid to move a hydraulic cylinder piston rod against the workpiece, and then a pneumatic cylinder piston rod of the pneumatic cylinder is forced into the oil storage space of the hydraulic cylinder to enhance the pressure at the hydraulic cylinder piston rod against the workpiece.04-25-2013
20100307331TELESCOPIC COMPOSITE CYLINDER HYDRAULIC HOIST - The present invention is a telescopic composite cylinder that functions as a hydraulic hoist incorporating multiple cylinders formed of composite materials. The walls of the multiple cylinders may be formed of pultruded composite material, or a combination of composite materials. The cylinders of the hydraulic hoist may incorporate a plurality of piston and sleeve assemblies that are mounted so as to invoke a telescopic relationship between the multiple cylinders. The materials that the cylinders are formed of may create walls having a smooth surface that can eliminate problems facing hoists formed of other materials, for example, such as a honing process, fluid leakage and seal wearing problems. The hoist may be run on diesel fuel drawn from the tank of a vehicle. Additionally, the present invention may be releseably attached to a surface by way of a saddle mounting system.12-09-2010
20120186442Double Cylinder Type Hydraulic Mechanism - A hydraulic mechanism includes an outer cylinder having an expansion side working port and a contraction side working port respectively formed on a top of the outer cylinder; an inner cylinder insertedly installed inside the outer cylinder to come in and out toward a bottom of the outer cylinder; an inner rod having two flow paths respectively connected to the expansion side working port and the contraction side working port, one end of which is fixed to an inner top surface of the outer cylinder, and the other end of which passes through a top of the inner cylinder and protrudes to be positioned inside the inner cylinder; and a piston combined with the other end of the inner rod to be positioned inside the inner cylinder and formed with a hole connected to the flow path of the inner rod connected to the expansion side working port.07-26-2012
20090173221FLUID POWER LINEAR DRIVE DEVICE - A fluid power linear drive device comprises a housing tube on whose outer periphery an output drive slide can slide linearly. For this purpose on the outer periphery of the housing tube there are two guide face pairs each having two guide faces extending along the housing tube on the outer periphery of the housing and, in the axial is direction of a first transverse axis of the housing tube, opposite each other, which in the direction of a second transverse axis, perpendicular to the first transverse axis, are spaced apart. The guide faces, as considered in a cross section of the housing tube, are slanted in each case in relation to the first and second transverse axis, first bearing elements arranged on the output drive slide are engaging the guide faces of the one, first guide face pair, such first bearing elements being able to pivot in relation to a pivot axis extending in the longitudinal direction of the housing tube independently of each other in relation to the output drive slide, and the guide faces of the other, second guide face pair are engaged by second bearing elements arranged of the output drive slide, the transverse position of the second bearing elements assumed in the axial direction of the first transverse axis in relation to the output drive slide being able to be varied.07-09-2009
20130205989Axial Piston Machine having a Retraction Plate, and Method for the Production Thereof - An axial piston machine comprises a cylinder drum in which a multiplicity of pistons are arranged in a longitudinally displaceable manner. The pistons are supported, via sliding blocks, on a running surface which is inclined relative to the cylinder drum axis. The sliding blocks are held, at that side thereof which faces away from the running surface, by means of a retraction plate. The retraction plate is produced from processed sheet metal in a non-cutting punching and stamping process.08-15-2013
092008000 WITH MEANS TO CONTROL FLOW OF NON-WORKING ARRESTING FLUID FOR WORKING MEMBER 5
20080236383POSITIONING CONTROL MECHANISM FOR SINGLE-ACTING AIR CYLINDER - An electromagnetic operation-type automatic pressure-adjusting valve outputting an air pressure corresponding to an amount of electric power is connected in an air flow path connecting a pressure chamber of a single-acting main cylinder and an air source. A controller is configured to obtain a relationship between a position of a piston and an air pressure from a relationship between the position of the piston of the main cylinder and a spring force of a return spring, and a relationship between the air pressure supplied to the pressure chamber and an acting force applied to the piston by the air pressure. When a target position of a movement of the piston is inputted to the controller, the controller is operated to move the piston toward the target position and to stop the piston at the position by means of controlling the amount of electric power for the automatic pressure-adjusting valve so that an air pressure corresponding to the target position is outputted.10-02-2008
20110296981SHOCK ABSORBER - A shock absorber has an upper cylinder, a piston valve mounted on a lower end of the upper cylinder, a free piston slidably mounted in the upper cylinder and dividing the upper cylinder into an air chamber and an upper oil chamber, a lower cylinder slidably mounted around the lower end of the upper cylinder and has a lower oil chamber. Since the free piston and the air chamber are disposed in the upper cylinder, the shock absorber has a compact structure. Furthermore, when the upper and lower cylinders slide relatively, the free piston slides accordingly to regulate volume of the upper oil chamber and to provide a damping effect. The hydraulic oil in the shock absorber does not contact air and therefore no air permeates into the hydraulic oil.12-08-2011
20090205485Pneumatic retarding device - The invention concerns a pneumatic retarding device with a cylinder dividing the cylinder into a displacement chamber and a compensation chamber and including a piston with a piston rod movably supported in the cylinder and having a piston seal element wherein, upon movement of the piston, a piston movement opposing force is generated while an air leakage flow is established past the piston for damping piston movement. The piston and the piston rod are formed integrally and the piston seal element has at least two deformation zones of which one responds faster to a pressure change in the displacement chamber then the other which is subjected to the pressure change via a restrictive passage. Also, a guide system is provided with such a retarding device.08-20-2009
20090293714Continuously Blockable Locking Device - A continuously blockable locking device with a cylindrical housing forming a work chamber, a closed first end and a second end located opposite from the closed end, a piston rod which is guided out of the housing in a sealed manner through the second end so as to be arranged coaxial to the center longitudinal axis by means of a guiding and sealing device, a piston which is arranged at the end of the piston rod situated in the housing and which divides the work chamber into a first work space, through which the piston rod extends, and a second work space, and a housing which is connected to, or can be connected to, the housing and which forms a valve chamber, a first valve assembly and a second valve assembly being arranged therein. The work chamber is always completely filled with a liquid medium and the valve chamber is at least partially filled with a liquid medium.12-03-2009
20090056532PNEUMATIC BRAKE BOOSTER - A pneumatic brake booster with a booster housing is subdivided into at least one working chamber and at least one vacuum chamber by means of at least one axially movable wall capable of being acted upon with a pneumatic differential pressure. An actuable input member includes a valve piston, with an output member for acting upon a brake master cylinder with an output force. A control valve is arranged in a control housing and can be actuated by the valve piston for controlling the differential pressure. An elastic reaction element is arranged in a control housing recess and against which the output member bears. Means for setting a distance z between the valve piston and the reaction element are provided on the output member.03-05-2009
092144000 WITH ENCOMPASSING HEAT EXCHANGE MODIFYING SPACE OR JACKET 4
20130047839ACTIVATION UNIT WITH AN ACTUATOR - An activation unit is disclosed having at least one actuator having a variable length disposed around at least one first axis. The activation unit operatively interacts with an activation element mounted so that it can be bi-directionally deflected along a second axis. The front side of the actuator is indirectly or directly engaged with a first piston, which can be deflected along the first axis in a mechanically positively driven manner. The first piston has a front side facing away from the actuator which axially borders at least regions of a transfer medium on one side. The transfer medium is radially surrounded relative to a first axis by a housing radially to the first axis, and axially borders at least regionally a front side of at least one second piston. The at least second piston can be deflected in a mechanically positively driven manner, and engages the activation element directly or indirectly. An actively variable and/or passive temperature control medium is provided on and/or in the housing that is in indirect or direct thermal contact with the transfer medium.02-28-2013
20110030552COMPRESSED AIR ENERGY STORAGE SYSTEM UTILIZING TWO-PHASE FLOW TO FACILITATE HEAT EXCHANGE - A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a control system, one or more heat exchangers, and, in certain embodiments of the invention, a motor-generator. The reversible air compressor-expander uses mechanical power to compress air (when it is acting as a compressor) and converts the energy stored in compressed air to mechanical power (when it is acting as an expander). In certain embodiments, the compressor-expander comprises one or more stages, each stage consisting of pressure vessel (the “pressure cell”) partially filled with water or other liquid. In some embodiments, the pressure vessel communicates with one or more cylinder devices to exchange air and liquid with the cylinder chamber(s) thereof. Suitable valving allows air to enter and leave the pressure cell and cylinder device, if present, under electronic control.02-10-2011
20110247488HIGH-PRESSURE PUMP - A high-pressure pump includes a plunger for pressurizing a fuel, a cylinder accommodating the plunger reciprocatably in its axial direction and a pump body. The pump body defines a pressurization chamber, a low-pressure fuel passage hydraulically connecting a fuel inlet and the pressurization chamber, and a discharge passage. The pump body further defines a cylindrical space around the cylinder. The fuel flows into the cylindrical space from the low-pressure fuel passage so as to cool the cylinder. The entire outer surface of the cylinder can be surely cooled.10-13-2011
20090071324WATER-COOLED PISTON COMPRESSOR - A water-cooled piston compressor having at least one air-compressing piston, which can be driven with means for producing a linearly oscillating drive force and which is accommodated in an axially movable manner in a cylinder housing which is closed at the end face via a cylinder head and is provided with water-cooling means, wherein the water-cooling means comprise a cylinder housing which is formed with a double wall and on whose end face facing the cylinder head a plurality of cooling openings are arranged, via which coolant flowing through the double-walled cylinder housing comes into contact with the region of the cylinder head.03-19-2009
092088000 SEALED OPENING IN LONGITUDINAL WALL OF CHAMBER FOR RECEIVING WORKING MEMBER PORTION 4
20100083823ROD-LESS CYLINDER DEVICE AND SYSTEM AND METHOD FOR OPERATING THEREOF - The disclosure provides a rod-less cylinder, device adapted to longitudinally displace loads, said device comprising a shaft, a nut confined to move longitudinally within the shaft, a slider circumscribing said shaft and coupled to said nut, a drive adapted to displace said nut within said shaft, and a sensing means adapted to affect a signal sent via wireless means towards said drive.04-08-2010
20100031813RODLESS CYLINDER DEVICE - A rodless cylinder device includes a piston body integrated with the central top portion of a rolling diaphragm, a cylinder body which fixes the circumferential annular fixing portion of the rolling diaphragm and in which the piston body is fitted to be freely movable, a slit which is formed in the cylinder body to extend therethrough and elongated in an axial direction, an inner-to-outer connector fixed to the piston body and projecting outwardly through the slit, an external moving body positioned outside the cylinder body and fixed to the inner-to-outer connector, and a supply and exhaust mechanism, formed between the rolling diaphragm, the cylinder body and the piston body, the supply and exhaust mechanism supplying and exhausting a pressure fluid to and from a pressure chamber.02-11-2010
20120031264SOLVENT DELIVERY PUMP - A plunger seal and a backup ring are provided at a portion of a pump chamber through which a plunger is inserted. A back face of the backup ring is supported on a wall face of a cleaning chamber. The backup ring is a combined backup ring including two resin layers, i.e., a deformable resin layer and a non-deformable resin layer. A face of the backup ring in contact with the plunger seal is made up of a face of the deformable resin layer and an inner peripheral face is made up of a face of the non-deformable resin layer. The deformable resin layer is a resin layer having a higher elastic modulus than the plunger seal and having such an elastic modulus as to be able to absorb deformation of the plunger seal. The non-deformable resin layer is a resin layer having a higher elastic modulus than resin of the deformable resin layer.02-09-2012
20120266749Reciprocation Pump And A Dialysis Apparatus Equipped With The Reciprocation Pump - A reciprocation pump has a supply liquid-side sub-pumping chamber arranged adjacent to the supply liquid-side pumping chamber at an external side. A waste liquid-side sub-pumping chamber is arranged adjacent to the waste liquid-side pumping chamber at an external side. A rod extends through the supply liquid-side sub-pumping chamber, the supply liquid-side pumping chamber, the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber. The rod is connected to the reciprocation mechanism and the driving source to transmit a driving force of the driving source to the reciprocation mechanism. Sealing members are arranged, respectively, in walls through which the rod extends to partition the supply liquid-side pumping chamber and the supply liquid-side sub-pumping chamber as well as the waste liquid-side pumping chamber and the waste liquid-side sub-pumping chamber.10-25-2012
092139000 WITH CYLINDER WALL CONTACTING GUIDE ARTICULATED TO PISTON 4
20100275772COMPRESSOR SYSTEM AND FRAME - A reciprocating compressor is provided. In one embodiment, a reciprocating compressor frame includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame crosshead guide support structures extending outwardly from the central body along a respective crosshead guide. Other embodiments of compression systems, devices, and frames of such systems are also provided.11-04-2010
20100242720Bimetallic Crosshead - A reciprocating pump assembly having a crankshaft rotatable by an attached motor and coupled by a connecting rod to a crosshead member. On a side opposite the connection to the connecting rod, the crosshead member connects to a plunger. The plunger is coaxially disposed in a cylinder provided in a cylinder block. Rotating the crankshaft reciprocates the crosshead member and attached plunger. In an embodiment the crosshead member includes an outer shell and a core portion within the shell formed from a material different from the shell material.09-30-2010
20120152110COMPRESSOR SYSTEM AND FRAME - A reciprocating compressor is provided. In one embodiment, a reciprocating compressor frame includes a central body and at least two crosshead guides extending from opposite sides of the central body. Additionally, the compressor frame crosshead guide support structures extending outwardly from the central body along a respective crosshead guide. Other embodiments of compression systems, devices, and frames of such systems are also provided.06-21-2012
20130199364COUPLING DEVICE FOR CONNECTING A BRAKE INPUT ELEMENT TO A MAIN BRAKE CYLINDER AND METHOD FOR OPERATING SUCH A COUPLING DEVICE - A coupling apparatus has an input piston disposable on a braking input element and an output piston disposable on a brake master cylinder, to which a driver braking force is transferable via the input piston. In a first operating mode, the input piston displaced out of its initial position over a brake application distance less than a first minimum brake application distance, is spaced apart from the output piston. In a second operating mode, the input piston displaced out of its initial position over a brake application distance less than a second minimum brake application distance, is spaced apart from the output piston, and the driver braking force is transferable via the input piston to the output piston.08-08-2013
092085000 WITH CUSHIONING MEANS EFFECTIVE OVER A PORTION ONLY OF STROKE 4
20100212491FLUID PRESSURE CYLINDER - A fluid pressure cylinder including a first damper and a second damper provided respectively on a head cover and a rod cover, which are disposed on both ends of the fluid pressure cylinder so as to face toward a piston. The first damper and the second damper are formed from an elastic material, and are made up from a main body portion against which the piston abuts, and a plurality of legs that project from the main body portion and which are gripped between the head cover and the rod cover and an inner wall surface of the cylinder tube.08-26-2010
20100300283Hydraulic Cylinder - A pressure-receiving face plate 12-02-2010
20090101005FREE-PISTON DEVICE AND METHOD FOR OPERATING A FREE-PISTON DEVICE - There is provided a free-piston device, comprising at least one piston chamber in which at least one piston assembly is arranged for linear displacement, the at least one piston assembly being drivable under the action of a medium which expands in an expansion space, and the at least one piston chamber having a resilience space, in which a compressible gas is contained for exerting a returning force on the at least one piston assembly, and at which a control member is arranged for controlling the returning force while the free-piston device is in operation. A method for operating a free-piston device is also proposed.04-23-2009
20130199367Hydraulic Oil Cylinder and Related Equipments, Hydraulic Buffer System, Excavator and Concrete Pump Truck - A hydraulic oil cylinder has a buffer sleeve (08-08-2013
20100212491FLUID PRESSURE CYLINDER - A fluid pressure cylinder including a first damper and a second damper provided respectively on a head cover and a rod cover, which are disposed on both ends of the fluid pressure cylinder so as to face toward a piston. The first damper and the second damper are formed from an elastic material, and are made up from a main body portion against which the piston abuts, and a plurality of legs that project from the main body portion and which are gripped between the head cover and the rod cover and an inner wall surface of the cylinder tube.08-26-2010
20100300283Hydraulic Cylinder - A pressure-receiving face plate 12-02-2010
20090101005FREE-PISTON DEVICE AND METHOD FOR OPERATING A FREE-PISTON DEVICE - There is provided a free-piston device, comprising at least one piston chamber in which at least one piston assembly is arranged for linear displacement, the at least one piston assembly being drivable under the action of a medium which expands in an expansion space, and the at least one piston chamber having a resilience space, in which a compressible gas is contained for exerting a returning force on the at least one piston assembly, and at which a control member is arranged for controlling the returning force while the free-piston device is in operation. A method for operating a free-piston device is also proposed.04-23-2009
20130199367Hydraulic Oil Cylinder and Related Equipments, Hydraulic Buffer System, Excavator and Concrete Pump Truck - A hydraulic oil cylinder has a buffer sleeve (08-08-2013
092006000 EFFECTIVE AREA OF WORKING MEMBER END FACE SELECTIVELY VARIABLE 3
20090272262Piston-Chamber Combination - A piston-chamber combination comprising an elongate chamber which is bounded by an inner chamber wall, and comprising a piston means in said chamber to be sealingly movable relative to said chamber wall at least between a first and a second longitudinal position of the chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions, and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area at said second longitudinal position being smaller than the cross-sectional area at said first longitudinal position, said piston means can change dimensions thereby providing for different cross-sectional areas of the piston means adapting the same to said different cross-sectional areas of the chamber during the relative movements of the piston means between the first and second longitudinal positions through said intermediate longitudinal positions of the chamber, said combination engaging a rigid surface. Said combination is movable relative to said surface.11-05-2009
20100170391Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination - A combination of a piston and a chamber, wherein the chamber defines an elongate chamber having a longitudinal axis, the chamber having, at a first longitudinal position thereof, a first cross-sectional area thereof and, at a second longitudinal position thereof, a second cross-sectional area, the second cross-sectional area being 95% or less of the first cross-sectional area, the change in cross-section of the chamber being at least substantially continuous between the first and second longitudinal positions, the piston being adapted to adapt itself to the cross-section of the chamber when moving from the first to the second longitudinal position of the chamber. The piston may comprise an umbrella-like support structure or a fibre enforced deformable container comprising a foam or a fluid. The combination may be used in a pump, a linear actuator, a motor, or a shock absorber.07-08-2010
20090120283COMBINATION OF A CHAMBER AND A PISTON, A PUMP, A MOTOR, A SHOCK ABSORBER AND A TRANSDUCER INCORPORATING THE COMBINATION - A piston-chamber combination has an elongate chamber with a piston movable therein between first and second positions. The chamber has cross-sections of different areas and different circumferential lengths at the two positions, and substantially continuously different cross-sectional areas and circumferential lengths at intermediate positions, area and circumferential length at the second position being smaller than that at the first. The piston is elastically deformable and has other features to adapt to the different cross-sectional areas and circumferential lengths of the chamber during movements of the piston.05-14-2009
20090272262Piston-Chamber Combination - A piston-chamber combination comprising an elongate chamber which is bounded by an inner chamber wall, and comprising a piston means in said chamber to be sealingly movable relative to said chamber wall at least between a first and a second longitudinal position of the chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions, and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area at said second longitudinal position being smaller than the cross-sectional area at said first longitudinal position, said piston means can change dimensions thereby providing for different cross-sectional areas of the piston means adapting the same to said different cross-sectional areas of the chamber during the relative movements of the piston means between the first and second longitudinal positions through said intermediate longitudinal positions of the chamber, said combination engaging a rigid surface. Said combination is movable relative to said surface.11-05-2009
20100170391Combination of a chamber and a piston, a pump, a motor, a shock absorber and transducer incorporating the combination - A combination of a piston and a chamber, wherein the chamber defines an elongate chamber having a longitudinal axis, the chamber having, at a first longitudinal position thereof, a first cross-sectional area thereof and, at a second longitudinal position thereof, a second cross-sectional area, the second cross-sectional area being 95% or less of the first cross-sectional area, the change in cross-section of the chamber being at least substantially continuous between the first and second longitudinal positions, the piston being adapted to adapt itself to the cross-section of the chamber when moving from the first to the second longitudinal position of the chamber. The piston may comprise an umbrella-like support structure or a fibre enforced deformable container comprising a foam or a fluid. The combination may be used in a pump, a linear actuator, a motor, or a shock absorber.07-08-2010
20090120283COMBINATION OF A CHAMBER AND A PISTON, A PUMP, A MOTOR, A SHOCK ABSORBER AND A TRANSDUCER INCORPORATING THE COMBINATION - A piston-chamber combination has an elongate chamber with a piston movable therein between first and second positions. The chamber has cross-sections of different areas and different circumferential lengths at the two positions, and substantially continuously different cross-sectional areas and circumferential lengths at intermediate positions, area and circumferential length at the second position being smaller than that at the first. The piston is elastically deformable and has other features to adapt to the different cross-sectional areas and circumferential lengths of the chamber during movements of the piston.05-14-2009
092117000 MOVING CYLINDER 3
20110100208Air pump producing high pressure - Manually operated air pump for multistage compression of ambient air comprises a multiple coaxial cylinder arrangement. The air inlet (05-05-2011
20110179947REMANUFACTURING HYDRAULIC PUMPS - A hydraulic pump can be remanufactured to save the investment in its components that are not seriously worn or failed. Some of the worn components, such as the pump barrel and yoke, can be salvaged by replacing or rebuilding the worn features. In particular, a worn internal spline on the pump barrel can be replaced by a spline insert that is threaded to the pump barrel and includes a new internal spline. A worn actuation tab on a yoke for contacting an actuating piston can be replaced by adding a new tab wear button.07-28-2011
20130139680HYDRAULIC APPARATUS, HANDLE, AND METHOD OF PRIVIDING AN EXTENDABLE HANDLE - Handles, extendable handles, and linkage mechanisms are examples of apparatuses that include a body; a pivotably attached head; cylinder, actuator, or hydraulic actuator; a fluid passage or hose; and a valve, blocking means, or hydraulic control device. The valve, blocking means, or hydraulic control device may be normally open and may close only when held closed, and may be connected on one side to the fluid passage or hose and on another side to atmosphere. An operator may use a tool, such as a drywall flat box attached to the head, by holding the handle and controlling pivoting of the head by operating the valve. Methods include providing for an operator to control a tool on a handle, and include providing the handle and instructing the operator to actuate the blocking means to hold the tool in a constant orientation relative to the handle.06-06-2013
20110100208Air pump producing high pressure - Manually operated air pump for multistage compression of ambient air comprises a multiple coaxial cylinder arrangement. The air inlet (05-05-2011
20110179947REMANUFACTURING HYDRAULIC PUMPS - A hydraulic pump can be remanufactured to save the investment in its components that are not seriously worn or failed. Some of the worn components, such as the pump barrel and yoke, can be salvaged by replacing or rebuilding the worn features. In particular, a worn internal spline on the pump barrel can be replaced by a spline insert that is threaded to the pump barrel and includes a new internal spline. A worn actuation tab on a yoke for contacting an actuating piston can be replaced by adding a new tab wear button.07-28-2011
20130139680HYDRAULIC APPARATUS, HANDLE, AND METHOD OF PRIVIDING AN EXTENDABLE HANDLE - Handles, extendable handles, and linkage mechanisms are examples of apparatuses that include a body; a pivotably attached head; cylinder, actuator, or hydraulic actuator; a fluid passage or hose; and a valve, blocking means, or hydraulic control device. The valve, blocking means, or hydraulic control device may be normally open and may close only when held closed, and may be connected on one side to the fluid passage or hose and on another side to atmosphere. An operator may use a tool, such as a drywall flat box attached to the head, by holding the handle and controlling pivoting of the head by operating the valve. Methods include providing for an operator to control a tool on a handle, and include providing the handle and instructing the operator to actuate the blocking means to hold the tool in a constant orientation relative to the handle.06-06-2013
092084000 RESILIENT MEANS INTERPOSED BETWEEN WORKING MEMBER AND RELATIVELY MOVABLE POWER TRANSMISSION ELEMENT 3
20130047837Piston-Chamber Combination - A piston-combination comprising an elongate chamber bounded by an inner chamber wall, and comprising a piston sealingly movable in the chamber relative to the chamber wall at least between a first and a second longitudinal position of the chamber, said chamber having cross-sections of different cross-sectional areas at the first and second longitudinal positions, and at least substantially continuously differing cross-sectional areas at intermediate longitudinal positions between the first and second longitudinal positions, the cross-sectional area at said second longitudinal position being smaller than the cross-sectional area at the first longitudinal position, said piston changing dimensions and having different cross-sectional areas thereby adapting to different cross-sectional areas of the chamber during the relative movements of the piston between the first and second longitudinal positions through said intermediate longitudinal positions of the chamber, said combination engaging a rigid surface and being movable relative to said surface.02-28-2013
20110132187HYDRAULIC STORED-ENERGY SPRING MECHANISM - Exemplary embodiments are directed to a hydraulic stored-energy spring mechanism for a high voltage circuit breaker. The spring mechanism includes a working cylinder situated in a working cylinder housing, at least one spring and at least one compression piston. The compression piston is slidably displaceable in a storage cylinder. The at least one storage spring pressurizes fluid located in the storage piston via the compression piston. The storage spring is held in a form-fitting manner by a support tube unit in the preloaded state.06-09-2011
20130008304CYLINDER - A clamping cylinder is disclosed. The cylinder includes a cylinder block defining a receiving chamber and two vents communicating with the receiving chamber, the cylinder block further defining a through hole communicating with the receiving chamber at a side; a piston slidably mounted in the receiving chamber and defining a through groove corresponding to the through hole, the piston further comprising a resisting surface; and a pushrod assembly comprising a push block movably mounted in the through hole, and a resilient member mounted in the through groove, the resilient member is connected to the push block; wherein the resilient member is adapted to pull the push block towards the piston, and the resisting surface is configured to resist the push block so that the push block moves along the through hole when the piston slides along the receiving chamber.01-10-2013
092128000 WITH ASSEMBLY OR DISASSEMBLY FACILITATING MEANS 3
20100319529Valve Cap - There is disclosed a valve cap for sealing an aperture in a pump; a plugging assembly for use in a valve cap to provide a seal at an aperture in a pump; a docking unit for use with a plugging assembly for sealing an aperture in a pump; and a method of sealing an aperture in a pump. In an embodiment of the invention, a valve cap (12-23-2010
20120060685VARIABLE DISPLACEMENT RADIAL PISTON FLUID WORKING MACHINE - A variable displacement fluid working machine includes an inward ring and an outward ring, one of the inward ring and the outward ring including a rotatable ring cam coupled to a drive shaft, the other including a plurality of radially extending piston cylinders circumferentially spaced around the respective ring. The outward ring has first and second axially spaced structural members and a plurality of demountable blocks demountably retainable therebetween, the demountable blocks having either piston cylinders or ring cam segments. The demountable blocks are removable radially to facilitate maintenance and repair and to facilitate radial access to the inward ring.03-15-2012
20110247487LINEAR ACTUATOR - The present invention relates to a linear actuator. A slide table of the linear actuator includes a table main body and an end plate connected to another end of the table main body. On a base portion of the table main body, four workpiece retaining holes are formed, and fitting seats are disposed respectively about the workpiece retaining holes on radial outer sides thereof. The fitting seats are formed at the same time that the table main body is formed by press molding.10-13-2011
092087000 WITH NON-SEALING CLEANING MEANS 3
20130014638HYDRAULIC CYLINDER CONTAMINATION PREVENTION SYSTEM - A hydraulic cylinder contamination prevention system for preventing large and small contaminants from entering into a hydraulic cylinder, including a hydraulic cylinder rod cover for underwater use with at least one automatic valve for preventing water circulation between the outside environment and the enclosed environment of the cylinder rod cover when the cylinder is stationary, egress of water from the cylinder rod cover when the cylinder is retracted, and ingress of water into the cylinder rod cover when cylinder is extended, and an external and abrasive cylinder rod scrubber.01-17-2013
20110219947HIGH-PRESSURE FUEL PUMP - A high-pressure fuel pump includes a housing and a swash plate which is mounted in the housing and is arranged in an oil space of the housing. A drive shaft is connected to the swash plate and passes through a housing opening, and with a seal for the drive shaft, which seal is mounted in the housing in the region of the housing opening. The high-pressure fuel pump has a plurality of pump elements for sucking up, compressing and ejecting fuel, which pump elements can be acted upon consecutively by the rotatable swash plate. In a pump of this type, the fuel pump has at least one magnet, the magnetic force field of which acts on the oil space of the housing. Premature wear of the pump, in particular premature wear of the seal, is avoided since the magnet separates off iron-containing dirt particles found in the oil.09-15-2011
20120160090AIR CYLINDER - An air cylinder that can prevent foreign substances from intruding inside in an environment where fine foreign substances such as dust are scattered. The air cylinder includes, in a through hole of a rod cover, an annular lubricator impregnated with a lubricant so as to supply the lubricant to the rod and a liquid-absorptive annular dust wiper not containing a lubricant and provided for preventing fine foreign substances such as powder stuck to the rod from intruding inside. The lubricator and the dust wiper are disposed air-tightly and slidably in contact with the rod, and the dust wiper is located closer to a leading end of the rod than the lubricator.06-28-2012
092129000 ABUTMENT CONNECTION BETWEEN WORKING MEMBER AND POWER TRANSMISSION ELEMENT 3
20100101408ROTARY ACTUATOR - An actuator having one or more pistons. The piston has a rack formed in a skirt of the piston, with the rack recessed within the skirt of the piston in a groove formed between a top lip and a bottom lip. The gear, also called a pinion, engages the rack between the top lip and the bottom lip. As the rack traverses the gear, the shaft that extends through the gear is rotated. The top lip and bottom lip, and the recessed rack that is present within the skirt of the piston adds strength to the piston where the piston engages the gear. The top lip and the bottom lip assist in maintaining alignment of the rack with the gear so that the rack and gear properly mesh.04-29-2010
20100300281RETAINING SEGMENT - The invention relates to a retaining segment (12-02-2010
20110023704PUMP, IN PARTICULAR HIGH-PRESSURE FUEL PUMP - The invention relates to a pump, having at least one pump element, which has a pump piston driven in a lifting motion at least indirectly by a drive shaft. The pump piston is guided in a cylinder bore of a housing part of the pump, and the housing part has a cylindrical section surrounding the cylinder bore. A cup-shaped tappet is disposed between the pump piston and the drive shaft and has a bottom facing the drive shaft. A jacket of the tappet is guided on the cylindrical section of the housing part in a displaceable manner. A spring is provided, by means of which the tappet is pressurized toward the drive shaft. The pump piston abuts the bottom of the tappet with the front thereof facing the drive shaft. A disk is mounted on the pump piston in the end region thereof facing the base of the tappet has a greater outside diameter than the pump piston. The pump piston has the disk is secured in the tappet in the direction of the longitudinal axis of the pump piston by means of a safety element engaging in the disk.02-03-2011
092136000 WITH TOOTHED GEAR, SPLINE OR THREAD RIGID WITH WORKING MEMBER 2
20100192765FIELD ADJUSTABLE PISTON ACTUATORS - Field adjustable piston actuators are described. An example field adjustable piston actuator includes a housing having opposing openings and a chamber. Additionally, the example piston actuator includes a first plate coupled to the housing and adjacent one of the opposing openings. Further, the example piston actuator includes a second plate coupled to a yoke and the housing. The second plate is adjacent the other one of the opposing openings. Further still, the piston actuator includes a volume adjuster to provide field adjustment to change a volume of the chamber.08-05-2010
20100018387ROTARY ACTUATOR - In cylinder chambers 01-28-2010
092003000 WITH DISENGAGEABLE ROTARY DRIVE FOR MOVING WORKING MEMBER 2
20120111186DEVICE FOR THE DOSED ADMINISTRATION OF A FLUID PRODUCT, ADAPTED FOR THE REPLACEMENT OF A CONTAINER - A device for administering a fluid product, the device including a first housing part provided with a receiver for the product, a second housing part detachably connectable to the first housing part, a piston rod held such that it can be displaced for the exertion of an emptying movement, an actuatable or releasable drive element for the piston rod, a coupling element including a coupling input element that couples the drive element to the piston rod in a coupling engagement, transmits a driving force of the drive element to the piston rod, and triggers the emptying movement, and a decoupling element displaceably connected to the second housing part and coupled to the first housing part such that it is displaced, by a movement of the housing parts in relation to each other when the housing parts are separated into a decoupling position wherein the piston rod is decoupled from the coupling input element.05-10-2012
20120017756PNEUMATO-MECHANICAL REGENERATIVE POWER SOURCE - A pneumato-mechanical regenerative power source converts mechanical rotational power at an input/output shaft to stored potential energy, and vice versa, by coupling the input/output shaft to a ball screw via a planetary gear system, which translates a ball nut in cooperation therewith, which in turn translates a piston that provides for either compressing or expanding an associated energy storage gas. A first roller-clutch mechanism provides for locking the carrier of the planetary gear system when storing energy, and releasing the carrier when releasing stored energy, wherein upon release, the ball screw is coupled to the input/output shaft via an one-wayoverrunning clutch, and the carrier may be locked to limit the release of stored energy.01-26-2012
092580100 KNOCKDOWN OR FLOW CONDUIT STORAGE OR RETRIEVAL MEANS 2
20110000364Pump with Pivoting Needle - A hand pump with a rotatable portion of the pump head. The needle or adapter for attaching the pump to an inflatable is associated with the rotatable portion of the pump head so that the needle may be positioned in a first position for use and a second position for storage. The needle is protected by a sleeve when in the second position.01-06-2011
20110252959Pump - A pump includes a barrel slideably receiving an end of a piston rod. A valve seat is mounted to the barrel and has an air passageway. An adapter is mounted to the valve seat and includes a channel in communication with the air passageway. An end of a hose is connected to the channel. A coupling seat is mounted to the other end of the hose. A connecting block is mounted around the coupling seat. The connecting block is positionable to a side of the barrel. Two rotary inflation nozzles of different specifications are mounted to two ends of another hose. Each rotary inflation nozzle has a coupling thread for engaging with an inner thread of the coupling seat. When not in use, one of the rotary inflation nozzles is inserted into the barrel, and the other rotary inflation nozzle is engaged with an end portion on the piston rod.10-20-2011
092126000 WITH DIFFERENTIAL RADIAL THRUST PRODUCING MEANS FOR WORKING MEMBER 2
20090301293Compressor - Known compressors are equipped with gas bearings, in which the bearing nozzles are continuously supplied with a stream of gas. According to the invention, the gas bearing is a self-sufficient bearing, in which the supply pressure is independent of the delivery pressure. To achieve this, the compressor is equipped with a gas reservoir with a bearing supply pressure.12-10-2009
20100083824Lobe Design For Fuel Pump Actuation - A fuel system may include a fuel pump and a drive shaft. The fuel pump may include a reciprocating member and the drive shaft may include a lobe member engaged with the reciprocating member. The lobe member may linearly displace the reciprocating member and drive the fuel pump. The lobe member may include a first lobe having a first opening flank driving a first compression stroke of the fuel pump through engagement with the reciprocating member. The first lobe may have a profile providing a constant velocity for the linear displacement of the reciprocating member for a portion of the first compression stroke.04-08-2010
092142000 WITH RESERVOIR FOR NON-COMPRESSIBLE WORKING FLUID 2
20130074687Control of Underwater Actuators Using Ambient Pressure - A device for controlling an underwater actuator by using an ambient pressure potential at the operating depth may include a chamber including a first cavity, a second cavity and a third cavity; the first cavity including a gas at a first pressure including one of at surface atmospheric pressure, lower than surface atmospheric pressure, or a vacuum; the second cavity including a first fluid at a second pressure including at least one of at underwater ambient pressure or higher then underwater ambient pressure and being connected to a underwater fluid supply; the third cavity including a second fluid at a third pressure including at least one of underwater ambient pressure or higher than the underwater ambient pressure and being connected to the actuator.03-28-2013
20110048225CYLINDER APPARATUS - On a protrusion-formation portion of a rod guide, there are provided a first annular protrusion for supporting a radially outer side of a lid body and a second annular protrusion for supporting a radially inner side of the lid body. Accordingly, when an upper end side of an outer cylinder is caulked, the first annular protrusion provided to the rod guide is allowed to sandwich and fix the radially outer side of the lid body between the first annular protrusion and the caulked portion. Further, although the lid body is strongly pressed to the rod guide with use of a presser at the time of caulking the upper end side of the outer cylinder, a pressing force acting onto the lid body can be received by the second annular protrusion. As a result, the lid body is prevented from being permanently deformed. With this structure, the lid body can be formed to have a small thickness dimension.03-03-2011
092078000 WITH FLUID PURIFYING MEANS 2
20100018386COMPRESSOR - The compressor is provided with an oil separator for separating oil from refrigerant gas introduced into a separation chamber, an annular space for reserving oil separated from the refrigerant gas, and a reservoir chamber for reserving the thus separated oil. The oil separator is provided in a cylindrical hole formed in a discharge chamber from which the refrigerant gas is discharged and a lid for partitioning the cylindrical hole from the discharge chamber is provided in the cylindrical hole. The oil separator introduces the refrigerant gas from the discharge chamber to the separation chamber via the introduction passage. The annular space is provided around the lid and connected to the reservoir chamber via an oil passage. The reservoir chamber is connected to a crank chamber of a pressure lower than that in the discharge chamber.01-28-2010
20090173222Fluid System - The invention relates to a fluid system for a pump circuit (07-09-2009
092138000 WITH LINKAGE OR TRANSMISSION ENGAGING PORTION INTERMEDIATE SPACED WORKING MEMBER END FACES 2
20080289489Composite Piston Unit and Automatic Vehicle Transmission - A composite piston unit (11-27-2008
20110138995COMPRESSION SYSTEM HAVING SEAL WITH MAGNETIC COUPLING OF PISTONS - A system, in certain embodiments, includes a barrier with magnetic coupling between opposite sides of the barrier. For example, the system may include a first member with a first magnet that translates along with the first member, and a second member having a second magnet that translates along with the second member. The system also may include the barrier completely isolating the first member from the second member, wherein the first magnet magnetically couples with the second magnet through the barrier to impart translational motion from the first member to the second member.06-16-2011
092014000 WORKING MEMBER MOVES LOAD AND LATCHING MEANS FOR LOAD 1
20120152109FEEDER ARM SAFETY STAND - A safety stand for minimizing the effect of hydraulic failure in an agricultural harvester is disclosed. In one embodiment, a system for raising or lowering a pivotable safety stand is provided which may take the form of a remotely operated hydraulic safety stand. In another embodiment, the mechanical stop provides multiple stops along the length of travel of the piston to prevent the dramatic falling of the feeder arm under the force of gravity. In one embodiment, the safety stand is provided with a series of notches along a longitudinal edge of the safety stand which are designed to accept and received a protrusion affixed to a cylinder of a hydraulic cylinder which raises and lowers a feeder arm. When the feeder arm is raised, the hydraulic cylinder is in the full upright position, the safety stand can be lowered such that the protrusion enters and is held within a notch to prevent accidental downward movement of the feeder arm. If the notch fails, or the safety stand is not properly engaged, the longitudinal edge of the safety arm is allowed to follow the protrusion, until a subsequent notch is reached, which then engages the protrusion, safely stopping the downward path of the feeder arm.06-21-2012
092086000 WITH REMOVAL CONDUIT FOR LIQUID SEEPAGE FROM EXPANSIBLE CHAMBER 1
20090000468Procedure For The Loading Of A Working Cylinder, Control Module For It, Working Cylinder And Utilization Of The Same - The invention demonstrates how energy saving working cylinders are loaded with fluid under pressure in order, for example, to power devices for tensioning (toggle joint tensioning apparatus), and/or compressing and/or jointing and/or stamping and/or embossing and/or punching and/or welding, if necessary, under the interposition of gearing parts such as guides, parallelogram gears, toggle joint articulations or the like, with the fluid supply being controlled in such a way during the no-load stroke (idle stroke) of the piston (01-01-2009
092137000 WITH FLEXIBLE TRANSMISSION ELEMENT SECURED TO WORKING MEMBER 1
20090064857Pump Plungers and Methods - Various embodiments of the invention provide pumps, plungers and plunger assemblies, as well as methods of using them. In accordance with some embodiments, a plunger may comprise a ceramic material and/or may have a facial profile that may allow for more efficient pumping operations. In particular embodiments, for example, a plunger may have a facial profile that allows for deformation of at least a portion of the plunger when the face of the plunger is in contact with a pressurized fluid. Other embodiments provide plunger assemblies, which may comprise a flexible coupling attachment. Yet other embodiments provide pumps comprising such plungers and/or plunger assemblies.03-12-2009
092081000 WORKING MEMBER FORMS RESERVOIR FOR NON-COMPRESSIBLE WORKING FLUID 1
20120222546VARIABLE DISPLACEMENT PISTON-IN-PISTON HYDRAULIC UNIT - A piston-in-piston hydraulic unit is disclosed that utilises an elastic volume to store and release energy with each stroke by varying the hydraulic fluid volumes in and out of the hydraulic unit.09-06-2012
092261000 MISCELLANEOUS (E.G., CRANKCASE) 1
20100242721LINEAR COMPRESSOR - The present invention provides a linear compressor, including: a cylinder having a compression space of refrigerant therein; a piston linearly reciprocated inside the cylinder to compress the refrigerant; a supporter connected to the back of the piston; a plurality of front and rear main springs for elastically supporting the supporter; a motor cover installed at the front of the supporter with a predetermined interval in an axis direction to support the front main springs, a pair of supporting ends being formed by partially cutting an inner portion of the motor cover and bent backward; and a rear cover installed at the back of the supporter with a predetermined interval in an axis direction to support the rear main springs, and fixedly welded to the supporting ends of the motor cover. Unnecessary parts of the motor cover can be welded to the rear cover to prevent a material loss, and a mass-production process can be simplified to improve productivity.09-30-2010
092002000 ONE WORKING MEMBER RECIPROCATES AND ANOTHER ROTATES COMMON OUTPUT MEMBER 1
20080282878Pneumatic rotary actuator - A pneumatic rotary actuator includes a housing formed of a front shell and a rear shell, a shaft tube inserted through the housing, a piston fixedly mounted on the shaft tube and dividing the inside space of the housing into a front air chamber and a rear air chamber, a rotary member provided around the shaft tube and defining an air gap around the shaft tube in communication with the rear air chamber, an inner race mounted around the rotary member, a locknut fastened to the rotary member to lock the inner race to the rotary member, and a locating frame supported on a bearing around the inner race and having a first air inlet for guiding compressed air to the front air chamber through a first air passageway to move the piston and the shaft tube backwards and to further force a chucking head to grip the workpiece and a second air inlet for guiding compressed air into the rear air chamber to move the piston and the shaft tube forwards and to further release the chucking head from the workpiece.11-20-2008
092001000 WITH TEMPERATURE COMPENSATION 1
20130125743COMPRESSION OF MEDIA - A method and a device for compressing a gas-phase medium, particularly hydrogen or natural gas, in a single-stage or multistage process using at least one piston compressor, wherein the medium may have a water content up to total saturation with water. The medium to be compressed is heated before the compression at least to such point that the water is unable to condense out during the compression process, and the compressed medium undergoes a water separation process.05-23-2013
092048000 PLURAL FLEXIBLE WALL WORKING MEMBERS 1
20130186265SELF-RETRACTING ACTUATOR - The present invention relates to an actuator system comprising one or more expansion chambers comprising one or more cylindrical chambers serially connected through a connection channel. The present invention further relates to the use of an actuator according to the present invention for providing a linear or other type of displacement.07-25-2013
092107000 ANNULAR WORKING MEMBER OR ANNULAR LINEARLY EXTENDING CHAMBER THEREFOR 1
20110132188MULTI-PART PISTON CONSTRUCTION FOR A BRAKE CALIPER OF A DISK BRAKE - A multi-part piston for a brake saddle of a hydraulically and/or mechanically and/or electromechanically actuated disk brake is described herein. The piston is a pot open on one side and including a base and a wall attached thereto in one piece. The base can be impinged by brake pressure coming from the inside of the pot so that an outward-facing abutting surface of the base can be pressed against a brake lining. The inside of the pot receives at least one pressure piece associated with a parking brake mechanism. For simplified manufacture in the form of a modular piston system for use in various applications, it is proposed that the pressure piece and the base comprise conical surfaces facing one another for transferring braking pressure.06-09-2011
092077000 GROUND EMBEDDED EXPANSIBLE CHAMBER 1
20130174725SYSTEM FOR STORING POTENTIAL ENERGY AND METHOD FOR PRODUCING SUCH A SYSTEM - A system for storing potential energy includes a hydraulic cylinder, a mass to be lifted, and a sealing ring at the edge of the mass to be lifted. The mass to be lifted is a solid rock mass in the form of a cut-out solid rock. The hydraulic cylinder is formed by the cavity between surrounding rocks and the cut-out solid rock. The cavity is sealed with respect to the surrounding rocks by the sealing ring. A method for producing such a system is also provided.07-11-2013

Patent applications in class Expansible chamber devices

Patent applications in all subclasses Expansible chamber devices