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| Number | Title | Issue Date |
| 6598406 | Wave spring loaded split seal system A piston includes a circumferential groove having a seal ring and spring mounted within the groove. The spring exerts an axial force on the seal ring thereby preventing motion of the seal ring within the groove. Preferably, the spring in a wave spring, wh... | 07/29/2003 |
| 6408631 | Wave spring loaded split seal system A piston includes a circumferential groove having a seal ring and spring mounted within the groove. The spring exerts an axial force on the seal ring thereby preventing motion of the seal ring within the groove. Preferably, the spring in a wave spring, wh... | 06/25/2002 |
| 6180876 | Apparatus and method for RF shielding of a printed circuit board An apparatus and method for shielding discrete areas of a printed circuit board from electromagnetic interference includes a frame and separate shielding lids. The frame is surface mount soldered onto the solder tracks of a printed circuit board and provi... | 01/30/2001 |
| 5938207 | Heat engine rod seal system A rod seal system having a pair of rod seals that form a buffer area between a high pressure area containing working gas and a low pressure area of a heat engine, such as a Stirling cycle engine. A pump that becomes passively charged with working gas at r... | 08/17/1999 |
| 5309715 | Stirling engines A Stirling engine with mechanical output through a crankshaft (57) has piston(s) (42) reciprocable in cylinder bore(s) (41). The piston to crankshaft connection includes a lever arm (74) on pivot pin (77) and a connecting rod (75). The lever arm passes th... | 05/10/1994 |
| 5199722 | Seal assembly for stirling engine A Stirling engine seal assembly includes a seal ring body and an expander. The seal ring body consists of a matrix made of polytetrafluoroethylene compounded and filled with carbon fibers and at least one powder selected from the group consisting of carbo... | 04/06/1993 |
| 5199345 | Piston compressor for the oilfree compression of a gas The piston compressor exhibits at least one piston (7) which is supported to be freefloating and connected via a piston rod (6) to a crosshead (5). The piston rod slides in a guide bearing (8) next to the crosshead in a gland (11) next to the cylinder. A ... | 04/06/1993 |
| 5195320 | Piston-cylinder assembly particularly useful in stirling cycle machines A piston-cylinder assembly in which the piston includes two piston heads connected together in spaced relation by a stem and cooperable with two portions of the cylinder, dividing the cylinder into a working chamber on one side of the first piston head be... | 03/23/1993 |
| 5133564 | Piston ring assembly for stirling engine A piston ring assembly for use in a stirling engine, which includes main rings each having a slit and a slanted surface for preventing ring rotations against one another wherein the main rings are engaged in a ring groove disposed at the exterior of a pis... | 07/28/1992 |
| 5056419 | Sealing device for a piston rod of a stirling engine The present invention relates to a sealing device provided between a piston rod of a Stirling cycle engine and a variable volume chamber. The sealing device is provided with an arrangement so as to equalize pressures between a seal chamber and the variabl... | 10/15/1991 |
| 4836094 | Yieldably mounted lubricant control assemblies for piston rods Improved lubricant control assemblies are disclosed for reciprocating piston rods of an engine which prevent crankcase lubricant intruding into the cylinders and fluid from the cylinders from escaping into the crankcase. Each assembly comprises a tubular ... | 06/06/1989 |
| 4769992 | Reciprocation apparatus with sealing mechanism In a sealing mechanism for a reciprocation apparatus for use in a reciprocating engine having a reciprocation member (108), such as Stirling engine, oil or a fluid is enclosed in a fluid room constituted by a pair of flexible partioning members (112,113) ... | 09/13/1988 |
| 4736586 | Seal mechanism for a Stirling engine A seal mechanism for a Stirling engine has an upper and lower piston ring mounted on a displacer piston with a space therebetween and at least one piston ring mounted on a power piston. The seals produced by the piston rings of the displacer piston are gi... | 04/12/1988 |
| 4691591 | Rod seal device for stirling engines A rod seal device for a Stirling engine includes a high pressure oil chamber, an oil seal, and a low pressure oil chamber in series disposed between a compression chamber of the engine and a driving unit of power take-off. The oil seal includes an annular... | 09/08/1987 |
| 4669736 | Stirling engine with improved sealing piston ring assembly A sealing piston ring assembly for a Stirling engine which is effective to maintain the required pressure differential on opposite sides of the piston while still enabling free reciprocating movement of the piston within the cylinder. The piston ring asse... | 06/02/1987 |
| 4623151 | Seal means for a stirling engine or the like A seal means for use in the Stirling engine or the like, the seal means comprising: a cylinder including a piston reciprocating therein, and a buffer chamber located in one of the spaces produced at the both sides of the piston; a tank for storing the wor... | 11/18/1986 |
| 4620418 | Stirling engine A Stirling engine wherein a pressure variation is provided by a reciprocative movement of a displacer and is effected upon a power piston to obtain an output motive force. A first elastic film is provided at the displacer rod projecting into the crankcase... | 11/04/1986 |
| 4615261 | Stirling engine with improved piston ring assembly An improved piston ring assembly, particularly for a Stirling engine, comprises a piston ring made from a TFE fluorocarbon such as Rulon which is disposed in a piston ring groove and is acted upon by an annular bi-metal element disposed between the groove... | 10/07/1986 |
| 4582328 | Double acting stirling engine piston ring A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby ... | 04/15/1986 |
| 4564202 | Seal for piston rod of Stirling engine A seal for a piston rod of a Stirling engine forcibly returns a fluid which has leaked into an intermediate chamber from this chamber to a fluid-filled chamber via an oil scraper adjacent thereto. The seal includes an O-ring secured to the piston rod at a... | 01/14/1986 |
| 4543792 | Refrigeration system with clearance seals In a split Stirling refrigerator, the dynamic seals about the displacer are virtually dragless clearance seals. The displacer is driven by pressure differential between a working gas and a gas in a spring volume, but the displacer movement is retarded unt... | 10/01/1985 |
| 4532766 | Stirling engine or heat pump having an improved seal A Stirling Engine or Heat Pump having two relatively movable machine elements for power transmission purposes includes a hermetic seal bellows interposed between the elements for separating a working gas from a pressure compensating liquid that balances p... | 08/06/1985 |
| 4501120 | Refrigeration system with clearance seals In a refrigeration system such as a split Stirling system, fluid seals associated with the reciprocating displacer are virtually dragless clearance seals. Movement of the displacer relative to the pressure variations in the working volume of gas is retard... | 02/26/1985 |
| 4495771 | Stirling-cycle engine A stirling cycle engine, especially for refrigerating motors, comprising a housing in which are assembled a rotating shaft, at least three working cylinders arranged in parallel round the shaft, a double-acting piston in each of the cylinders, and a mecha... | 01/29/1985 |
| 4483141 | Stirling cycle engine having shaft seal means A stirling cycle engine including a working piston defining a working chamber, a crankshaft located in a crankchamber, a connecting rod connecting the working chamber with the crankshaft, the connecting rod being passed through intermediate members. A gas... | 11/20/1984 |
| 4462601 | Piston-cylinder sealing device The invention relates to a seal for a piston and a cylinder of a double-acting hot gas engine or other applications in which piston rings of plastic materials should be used. A duct having low resistance against gas flow is provided between the high press... | 07/31/1984 |
| 4422649 | Stirling engine piston ring A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby ... | 12/27/1983 |
| 4415171 | Control system and shaft seal for Stirling cycle machine A Stirling cycle engine has power pistons disposed in power cylinders. Each power piston is interconnected by levers fixed on an oscillating shaft to a unidirectionally rotating output crank shaft. Reciprocating displacers are disposed in displacer cylind... | 11/15/1983 |
| 4406124 | Hermetically sealed transmission system for a free piston Stirling engine A torsionally flexible seal formed with alternating layers of elastic and reinforcing material provides a gas-tight barrier between a drive shaft and a portion of the Stirling engine housing surrounding a passageway through which the drive shaft extends. ... | 09/27/1983 |
| 4402186 | Stirling heating pump A Stirling heating pump has a working piston acting upon a compression chamber and actuated by a crank drive accommodated in a housing, and a diaphragm bellows surrounding the working piston for sealing the compression chamber from the housing and having ... | 09/06/1983 |
| 4335884 | Device for ensuring dynamic tightness, particulary for Stirling engine The invention relates to a device for insuring the tight seal of a closed space filled with a gas at high pressure through one wall of which an outlet rod is positioned, said outlet rod being subject to reciprocating rectilinear movement. Between the wall... | 06/22/1982 |
| 4235445 | Sealing system for piston rod of hot gas engine An improvement to a sealing system for restricting fluid flow around a piston rod between a piston cylinder and crankshaft space in a hot gas engine where a seal element is secured around the piston rod in an intermediate chamber, the improvement includin... | 11/25/1980 |
| 4193756 | Seal assembly and method for providing a seal in a rotary kiln A seal assembly and method for providing a contaminant-free, fluid-tight seal in a rotary kiln or similar rotating apparatus. A seal is provided between the rotating surfaces and the stationary surfaces of the kiln by providing an annular seal chamber def... | 03/18/1980 |
| 4185842 | Seal ring An improved composite seal ring is provided by making the L-shaped main seal ring and auxiliary seal ring of a thermoplastic or thermosetting synthetic resin and the ratio of the axial thickness of the thin wall portion of the main seal ring to the axial ... | 01/29/1980 |
| 4146237 | Sealing device for Stirling engine piston rod in which no separation of oil and gas is necessary In Stirling engines the high pressure of the cycle requires special seals on the piston rod to prevent leakage of gas out of the high pressure cylinder into lower pressure regions such as a crankcase. A liquid oil seal is developed in a chamber around the... | 03/27/1979 |
| 4132420 | Sealing rings for stirling engines Sealing rings located in an annular recess about a piston in a Stirling engine have a continuous sealing ring of polymeric material having an L-shaped cross-section producing an annular flange abutment. A second discontinuous polymeric ring has a surround... | 01/02/1979 |
| 4093239 | Piston rod sealing arrangement for a stirling engine A sealing arrangement for the light working gases of a Stirling engine comprises, surrounding the piston rod below the cylinder chamber, a block seal portion and a liquid seal portion, the latter including an oil scraping middle unit, a liquid chamber, an... | 06/06/1978 |
| 4083566 | Seal for piston rod of Stirling engine A Stirling cycle hot gas engine is provided with a seal about a moving piston rod for limiting leakage of gas from a high pressure working chamber into a low pressure crank casing. The seal is a conically shaped plastic ring urged against the piston rod b... | 04/11/1978 |
| 4026562 | Seals A seal for reciprocating members such as a shaft having a seal ring of deformable material on which an annular taper is maintained to provide pumping action for return of fluid to replenish fluid lost past the seal.... | 05/31/1977 |
| 3938811 | Sealing means for stirling engine crankcases A rotatable crankshaft extends from a crankcase and is sealed for leakage of gas under pressure by an oil chamber surrounding the crankshaft wherein the oil therein is rotated in the direction of crankshaft rotation and is supplied from an oil sump of the... | 02/17/1976 |
