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| Number | Title | Issue Date |
| 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 |
| 5865091 | Piston assembly for stirling engine A piston assembly for a double-acting engine such as a double-acting Stirling engine. A pair of sealing rings located on opposite sides of a sealing washer are positioned between a base section and a dome section of a piston head. These sealing rings are ... | 02/02/1999 |
| 5836235 | Piston for hydraulic actuating cylinders In order to reduce the weight and manufacturing cost of a piston for a hydraulic actuating cylinder, the piston, the piston rod and the external reinforcement cap are combined to form a unitary integral part. The unitary part is advantageously a single ex... | 11/17/1998 |
| 5787712 | Cryogenic refrigerator A cryogenic refrigerator includes a displacer and a cylinder therein for generating a very low temperature. And, a sealing ring is provided in an inserted condition within a ring shaped groove which is formed at an outer peripheral portion of the displace... | 08/04/1998 |
| 5769193 | Telescoping vibration damper Telescoping vibration damper consisting of a work cylinder, a piston which is guided on a piston rod and divides the work cylinder into two work chambers, and passages in the piston which empty on at least one end into a ring-shaped chamber, the encirclin... | 06/23/1998 |
| 5598762 | Fluid storage tank employing an isolation seal A fluid storage tank utilizing an isolation seal in which a leak proof isolation seal covers the entire head of the piston of the storage tank requiring only a single fluid tight seam to seal off the fluid storage chamber from the remainder of the storage... | 02/04/1997 |
| 5588350 | Manufacture of banded pistons A banded cylindrical piston for use in fluid cylinders is produced by hot-forming a relatively thin, flat washer made of polytetrafluoroethylene (PTFE) onto a grooved piston. A hot-forming sizing tube has a beveled entrance end on which the washer is init... | 12/31/1996 |
| 5435233 | Banded piston A piston for use in a hydraulic cylinder which is subject to sudden and extremely high shock load pressures and high temperature operating conditions is provided with a plurality of interlocking axially-spaced circumferential grooves. A relatively thin, f... | 07/25/1995 |
| 5385081 | Fluid storage tank employing a shear seal A fluid storage tank utilizing a shear seal in which a leak proof static shear seal covers the entire head of the piston of the storage tank requiring only a single fluid tight seam to seal off the fluid storage chamber from the remainder of the storage t... | 01/31/1995 |
| 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 |
| 5345860 | Banded piston and method of making A piston for use in a hydraulic cylinder which is subject to sudden and extremely high shock load pressures and high temperature operating conditions is provided with a plurality of interlocking axially-spaced circumferential grooves. A band of a heat-for... | 09/13/1994 |
| 5052281 | Internal combustion engine piston with top-land circumferential projection arrangement A piston installed into a cylinder of an engine includes annular projections formed in axially spaced relation on a top land facing a cylinder inner wall and having a saw-toothed cross-section in which the external diameter of the projections are such tha... | 10/01/1991 |
| 5042365 | Annular preloaded seal for a sliding piston in cylindrical tank A peripheral sliding seal for sealing the liquid propellant in a cylindrical tank 10 containing a piston 14 for positive expulsion of the liquid propellant. The seal comprises a peripheral inward flange member 16 around the piston periphery adjacent the i... | 08/27/1991 |
| 4928577 | Piston and cylinder unit It is a question of a piston and cylinder unit comprising a cylinder barrel defining a piston space, a piston able to run axially in said barrel with a support action due to a peripheral bearing surface of the barrel. The piston includes at least one annu... | 05/29/1990 |
| 4759266 | Multiple part oil-control ring for piston An oil control ring for a piston in an i.c. engine comprising an expander ring and two lamellar rails which scrape the oil from the cylinder wall. The expander ring has two series of lugs arranged alternately on each side, which support the rails and two ... | 07/26/1988 |
