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| Number | Title | Issue Date |
| 7252292 | Oil ring for an internal combustion engine An oil ring for an internal combustion engine, comprising a metallic annular body (10) to be mounted around a piston (P) reciprocating inside a cylinder (C) of the engine, said annular body (10) having opposite lateral faces (11), an internal fa... | 08/07/2007 |
| 7036823 | Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumption A side rail is formed into a ring shape having its generally rectangular section that has an outer surface 3 formed with a pair of edge surfaces 5 of small radius, and an intermediate surface 6 of large radius of curvature formed between the edg... | 05/02/2006 |
| 6682078 | Ring groove for oil ring with coil expander of piston A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring gro... | 01/27/2004 |
| 6619430 | Refrigerant gas buffered seal system Refrigerant gas at a few psi higher than suction is supplied via labyrinth or annular groove type seals located between the suction side bearings and suction and between the suction side motor bearing and the motor. The buffer gas flow divides with part g... | 09/16/2003 |
| 6547251 | Ring groove for oil ring with coil expander of piston A ring groove for a two-piece oil ring of a piston is provided that has ring body equipped with a coil expander, wherein the ring body has an upper outer surface and a lower outer surface, both orthogonal to the axial direction of the piston. The ring gro... | 04/15/2003 |
| 6338488 | Sealing system enabling an assembly A method and device for a fit to size assembly of components or machine parts is provided in which fixed or relatively moving machine parts are sealed against inlet and outlet of a fluid material. A sealing member used for this sealing cannot be put in a ... | 01/15/2002 |
| 6213475 | Separating piston for a vibration damping system A separating piston for a vibration damping system with a cylinder which is filled partly with damping fluid and partly with pressure gas and with a separating piston which is arranged in the cylinder and divides the pressure gas space from the fluid spac... | 04/10/2001 |
| 6039321 | Piston ring device for use in a combustion engine of a vehicle A piston ring device for use in a combustion engine of a vehicle includes a compressing ring, a zigzag-shape oil ring and an auxiliary ring which is piled up from the auxiliary ring and combined with each other, so that the piston ring device can be easil... | 03/21/2000 |
| 5996545 | Internal combustion engine with a horizontal cylinder In order to prevent penetration of lubricant into the combustion chamber, a piston for an internal combustion engine has a labyrinthine pressure equalizing passage between the combustion chamber and the crankcase. For this purpose, the piston ring closest... | 12/07/1999 |
| 5697477 | Air damper An air damper includes: a piston adapted to reciprocate in a cylinder; an annular recessed portion formed along an outer periphery of the piston; a sealing member fitted in the recessed portion in a slidable manner, adapted to slidingly contact an inner p... | 12/16/1997 |
| 5347915 | Piston compressor for the oilfree compression of gases The piston (6) guided in a cylinder (1) has at least one split so-called trapped piston ring (10) disposed in an annular groove on the piston. The circumferential face (12) of the ring remote from the inner face (11) of the cylinder bounds in the annular ... | 09/20/1994 |
| 5251915 | Piston and ring assembly The oil control ring for a piston has a single low tension rail and a contiguous blocker ring, under light tension, to prevent oil flow through the rail end gap. A separate spring applies tension to the rail. A serpentine spring in conic form presses outw... | 10/12/1993 |
| 5016524 | Sealing arrangement for a piston in a compressor A continuous seal ring member fitted in a ring groove of a piston of a compressor. The seal ring member has a washer-like initial shape with an internal diameter smaller than an outer diameter of the piston, whereby the inner peripheral portion of the sea... | 05/21/1991 |
| 4936269 | Method and apparatus for reduced oil consumption and oil deterioration in reciprocating engines A method and apparatus for reducing oil consumption and oil deterioration in a reciprocating engine. The engine is provided with ceramic rings and ceramic cylinder linings. Minimal oil lubricant is adsorbed on the surface layer of the rings and liners to ... | 06/26/1990 |
| 4878519 | Piston accumulator An accumulator comprises a cylinder formed with a substantially closed chamber and a piston formed with a small-diameter central region and a pair of large-diameter end regions flanking the central region and each formed with an outwardly open annular gro... | 11/07/1989 |
| 4877257 | Piston ring A piston ring which consists of a sealing member supported by a flexible support structrue that deflects under applied loads to cause improved sealing and reduced wear. The support structure is constructed to react the applied loads such that the sealing ... | 10/31/1989 |
| 4854554 | Pneumatic spring structure with dual output force and pressure decay compensation and method of operation A transversely mounted, single pneumatic spring, and dual bell crank and idler link assembly providing a compact counterbalance for hinged closures such as automobile trunk lids. Pneumatic spring enhancements, e.g., a multi-output force feature and a pres... | 08/08/1989 |
| 4795173 | Double O-ring sealing arrangement A double O-ring sealing arrangement for a pressure responsive device wherein a storage-buffer chamber is provided between the double O-rings and is kept at a high pressure even when the actuating pressure for the pressure responsive device is dropped belo... | 01/03/1989 |
| 4785922 | Gun recoil mechanism A constant-pressure hydraulic shock-absorbing device suitable for use as a recoil brake in a weapon system. By use of a piston that decreases in diameter as the applied force increases, a constant resistive force independent of the applied force is obtain... | 11/22/1988 |
| 4741543 | Piston scraper ring A cylinder and piston assembly with an oil scraper ring having a radially washer seated in a radial piston groove, and a scraping skirt having a radially resilient truncated portion with the base edge engaging the cylinder wall in a scraping line located ... | 05/03/1988 |
| 4470388 | Fully hydrodynamic piston ring and cylinder assembly A piston ring and cylinder assembly designed for fully hydrodynamic operation with oil control is disclosed. The rings are loaded in circumferential compression and are flexible. They conform instantaneously to cylinder wall distortions and oil film force... | 09/11/1984 |
| 4470375 | Fully hydrodynamic piston ring and piston assembly with elastomerically conforming geometry and internal cooling A piston ring and piston assembly designed for operation with the piston skirt fully flooded with oil and with the piston rings operating as fully hydrodynamic sliders is disclosed. Geometries of rings and piston skirt are arranged to conform elastically ... | 09/11/1984 |
| 4452464 | Oil ring An oil ring having an axially and radially thin cross-section and a single cylinder contacting face to bear against the cylinder wall with a pressure of 2 Kg/cm2 to 6 Kg/cm2. The oil ring is dimensioned to satisfy the following equat... | 06/05/1984 |
| 4431199 | Self-hydraulic pressure generating and maintaining device for shaft-seal mechanism A pressurizing device for a pump seal includes a cylindrical chamber fitted over an extension of a pump shaft external of the seal with a sliding piston inside the chamber being mounted for reciprocation relative to the external shaft portion in dividing ... | 02/14/1984 |
| 4244553 | Hydraulic actuation system for engine valves This invention relates to an hydraulic actuation system for poppet valves of internal combustion engines. In substance, the system replaces the valve guide and spring assemblies of conventional mechanisms with miniature hydraulic actuators wherein the val... | 01/13/1981 |
| 4154207 | Piston and ring for reducing HC emissions An internal combustion engine is provided with pistons having openings connecting the space behind one of the piston rings with the crankcase during certain portions of the operating cycle of the engine. This is accomplished by the use of a differential p... | 05/15/1979 |
| 4103594 | Piston and scraper ring assembly A piston is formed with a peripheral groove for receiving a scraper ring, and an annular, axially extending recess is formed in the face of the scraper ring groove on the side thereof toward the piston crown and adjacent the piston wall, with the recess t... | 08/01/1978 |
| 3980004 | Piston and seal assemblies A piston and seal assembly is adapted to work in a cylinder, particularly a master cylinder of a vehicle braking system, the seal having a lip which sealingly engages the cylinder bore on the pressure stroke, an inner portion mounted on the piston, and an... | 09/14/1976 |
