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| Number | Title | Issue Date |
| 7870819 | Piston device and manufacturing method thereof A piston device and its manufacturing method are disclosed. The piston device comprises a piston body having at least one annular groove on the side wall of the piston body, and at least one piston ring made of flexible material and mounted in the annular groove. Th... | 01/18/2011 |
| 7367435 | Shock absorber design method A shock absorber preferably used for an automobile aims at inhibition of noise caused by self-induced vibration. The shock absorber includes a piston, a working cylinder for housing the piston; and a rod, one end of which being attached to the piston and the other e... | 05/06/2008 |
| 7310876 | Method for making a piston body A method for producing a one-part piston body for a piston-cylinder arrangement, in particular a shock absorber piston, is disclosed. The method may include in a first step, pressing a green compact comprising a revolving web and longitudinal support webs from a sin... | 12/25/2007 |
| 7204184 | Guide system with pneumatic stop for a movable component In a guide system with a pneumatic stop structure comprising a cylinder with a piston including a piston seal element movably disposed in the cylinder and a piston rod connected to the piston and extending from the cylinder wherein a displacement chamber is formed a... | 04/17/2007 |
| 7197976 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 04/03/2007 |
| 7185581 | Composite fluid actuated cylinder A fluid actuator having a honed metallic sleeved inner liner assembled with fitted end caps. The inner liner and end caps are wound with carbon reinforced fiber filaments in both longitudinal and hoop orientations so as to withstand increased fluid pressure over tra... | 03/06/2007 |
| 7174829 | Adjustable piston pump An adjustable piston pump for displacement and extraction of remnant from soft sand and or soft soil includes a pump casing cylinder that is capped at one end and opens at the other end. It includes a handle fixed to the pump casing cylinder, a shaft rod, a shaft ro... | 02/13/2007 |
| 7140291 | Oil-free/oil-less air compressor with an improved seal An oil-free/oil-less air compressor with a piston positioned for reciprocating in a bore, the piston having a first piston ring assembly made from a rigid, high temperature polymer, and a second piston ring assembly comprising a first portion that engages the bore, ... | 11/28/2006 |
| 7121552 | Piston ring A piston ring includes a lateral surface which covers a circumferential surface of a piston and support segments with retaining surfaces which engage with the top and bottom of the piston. A piston ring joint allows the piston ring to be elastically deformed in the ... | 10/17/2006 |
| 7093529 | Composite piston Devices, piston components, and methods are provided for an improved piston. One embodiment for a piston component includes a base having a side to receive a piston body. A tang is provided to the base and extends outward from the side of the base which is to receiv... | 08/22/2006 |
| 7066303 | Brake piston The present invention relates to a brake piston with reduced transmission of heat from the disk to the brake fluid. In particular, the present invention relates to a disk-brake piston (7) characterized in that it comprises a cup (12) having a sk... | 06/27/2006 |
| 7059128 | Hydraulic system for a motor vehicle The piston in the master cylinder of a hydraulic system of the kind that is used particularly in motor vehicles is made of a duroplastic polymer material. ... | 06/13/2006 |
| 7048009 | Fluid accumulator This invention relates to a fluid accumulator comprising a wall (2) encompassing a reservoir (1) for receiving the fluid, part of the wall being elastically deformable. The wall (2) of the fluid accumulator comprises a first wall portion (2 | 05/23/2006 |
| 7028928 | Hard coating of an impact surface of a solenoid actuator and fuel injector using same A fluid control valve assembly controls the flow of actuation fluid to and from a fuel injector. The fluid control valve assembly includes at least one solenoid actuator attached to a valve body. The solenoid actuator includes a stator and an armature comprised of a... | 04/18/2006 |
| 6959906 | Blow-off valve for a hydraulic dashpot A blow-off valve for a hydraulic dashpot comprising a fluid charged cylinder (1) and a piston (3) that travels back and forth therein on the end of a piston rod. The piston partitions the cylinder into two compartments (6 & 7) and is prov... | 11/01/2005 |
| 6941852 | Unitary hollowed piston with improved structural strength A unitary, “hollow out” piston is molded or forged with only two tools, which move along a single parting direction, with a pair of arcuate side walls that provide maximal outer surface area with minimal thickness and weight. The thin walls are internally fortif... | 09/13/2005 |
| 6931983 | Device for circulating sealing gas for mechanical dry seals of a centrifugal compressor at times when the machine is stationary and pressurized A device (10) for circulating sealing gas for mechanical dry seals (11) of a centrifugal compressor (13) at times when the machine is stationary and pressurized; the device comprises a sealed reciprocating compressor (12), which includes ... | 08/23/2005 |
| 6928923 | Piston with supporting connector elements for a piston-cylinder arrangement, in particular a shock absorber piston A piston for a piston-cylinder arrangement, in particular a shock absorber piston exhibiting a piston body (6) provided with one peripheral web (12) protruding from the peripheral surface, disposed on said peripheral surface in both areas, each of whic... | 08/16/2005 |
| 6925925 | Piston for a compressor In a piston for a compressor, the piston comprises a stem by which the piston may be guided in the housing in an axially displaceable manner, and a force introducing section where an outer drive force can be introduced into the piston. The piston head, the piston sk... | 08/09/2005 |
| 6911063 | Compositions and fabrication methods for hardmetals Hardmetal compositions each including hard particles having a first material and a binder matrix having a second, different material comprising rhenium or a Ni-based superalloy. A two-step sintering process may be used to fabricate such hardmetals at relatively low ... | 06/28/2005 |
| 6817378 | Fluid flow control damper assembly A fluid flow control damper assembly having a damper vane and a piston actuator is relatively easy to install when the outer surface of a duct is inaccessible. The piston actuator includes a powder metal piston, lacking an elastomeric (for example, rubber) seal, tha... | 11/16/2004 |
| 6796217 | Injector assembly capable of preventing subsequent dripping, as well as plunger and seal member for the injector assembly A plunger for being inserted in a tubular barrel in an axially movable manner includes a plunger body having a distal end positioned within the barrel and a proximal end positioned outside of the barrel, and a seal member disposed on the distal end of the plunger bo... | 09/28/2004 |
| 6766710 | Hydraulic control device for operating a sliding selector shaft A hydraulic control device operates a sliding selector shaft, in particular a gearbox for motor vehicles, with a bore made in a wall of a gearbox housing for accommodating a plastic piston. The piston is actively connected to the sliding selector shaft and delimits ... | 07/27/2004 |
| 6739236 | Piston for fluid machine and method of manufacturing the same A piston is used for a fluid machine. The fluid machine has a cylinder bore and a piston driving unit for driving the piston in a housing. The piston has a piston body made of resin, a coupler made of metal and a resin unit. The piston body is accommodated in the cy... | 05/25/2004 |
| 6595341 | Aluminum-coated plastic member A composite part of a clutch for use in a motor vehicle has a plastic carrier and a film of oxidized aluminum or an aluminum alloy overlying and adhering to that part of the carrier which is in sliding contact with at least one other part of the clutch. O... | 07/22/2003 |
| 6568313 | Fluid pressure cylinder apparatus A fluid pressure cylinder apparatus comprises a cylinder tube integrally connected between a head cover and a rod cover; a piston internally installed in the cylinder tube, for making displacement in accordance with an action of a pressure fluid supplied ... | 05/27/2003 |
| 6490964 | Master brake cylinders having overmolded seals A master brake cylinder for use in a braking system of a vehicle, which contains pistons, having seals molded thereon. Overmolding the elastomer directly onto the pistons forms the seals. Also disclosed are improved master brake cylinder pistons having se... | 12/10/2002 |
| 6450084 | Piston with piston ring A piston (1) with a piston ring (10) for a hydraulic or pneumatic unit fitted with a damping device and is mounted on a piston rod, dividing a cylinder (9) into two working areas and consisting of at least two parts (2, 9) that are adjacent to a surface (... | 09/17/2002 |
| 6443048 | Piston for a cylinder and a method for its manufacture The invention relates to a piston for a cylinder, in particular a brake piston for a brake cylinder, made of a plastic. Such a piston is improved so that the piston is not damaged by wear, and furthermore can be manufactured inexpensively within the presc... | 09/03/2002 |
| 6443049 | Hydraulic piston A hydraulic piston for a disc brake assembly includes a metallic cylinder with a bottom at one end and a hollow resin cylinder with an opening at each end. The hollow resin cylinder is disposed in an inner surface of the metallic cylinder and closes the o... | 09/03/2002 |
| 6422130 | Piston and hydraulic control device for the clutch of an automobile provided with one such piston The invention relates to a piston for a hydraulic control device for a clutch, especially the clutch of an automobile, having a tubular metal sleeve with an internal transversal wall which is integral with the tubular body of the sleeve. A hydraulic chamb... | 07/23/2002 |
| 6415706 | Actuator The description relates to an actuator for use at high and low temperatures, with a cylinder block (8), a piston (14) movable therein and a piston rod (22) secured to the piston. A first and a second flange cover (46, 48) and a sleeve (40) in the cylinder... | 07/09/2002 |
| 6415705 | Swash plate type compressor piston whose end section is formed of a material different from that of swash-plate engaging portion A piston for a swash plate type compressor having a swash plate, including an engaging portion which engages the swash plate through a pair of shoes such that the shoes are held in contact with opposite surfaces of the swash plate at a radially outer port... | 07/09/2002 |
| 6408735 | Actuator An actuator having a piston member slideable within a cylinder, the piston member defining with the cylinder a first chamber and a second chamber, the effective cross-sectional of the piston member exposed to the fluid pressure within the first chamber be... | 06/25/2002 |
| 6401596 | Metallic cap for molded plastic disc brake pistons A metallic cap for a plastic disc brake piston is provided with openings in a cylindrical side wall thereof and the plastic is caused to flow into the openings during molding of the piston to create an extension of the plastic material which locks the cap... | 06/11/2002 |
| 6382367 | Actuating piston for a hydraulically and mechanically actuable, spot type disc brake An actuating piston (10) of a hydraulically and mechanically actuable, spot-type disk brake for motor vehicles, which is disposed in a sealing and displaceable manner in a cylinder bore of the disk brake is provided with an axial-force-transmitting conica... | 05/07/2002 |
| 6371257 | Piston assembly for use in a wheel cylinder of a drum brake assembly This invention relates to an improved structure for a piston assembly adapted for use in a wheel cylinder of a drum brake assembly, the drum brake assembly having a pair of brake shoes which are adapted to be urged into frictional engagement with a brake ... | 04/16/2002 |
| 6357340 | Piston compressor piston A coat layer formed on the outer perimeter side surface of a piston comprises a fluorocarbon resin and a binder as main components, and further contains 0.05-12% by volume of a wear resistance additive with a Mohs hardness of 2.0-5.0. This provides a pist... | 03/19/2002 |
| 6339984 | Piston for fluid machines Pistons, which are reciprocated by a swash plate of a compressor, have two separate parts joined together. Each piston has a body and a coupler. The coupler is connected to the swash plate. The body is made of thermosetting resin. The body is molded to th... | 01/22/2002 |
| 6327964 | Reciprocating pump The invention relates to a piston pump with a piston (10) that is guided so that it can move axially in a pump bore (12) of a pump housing (14). In order to simplify the manufacture of the piston (10), the invention proposes providing the piston (10) with... | 12/11/2001 |
