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| Number | Title | Issue Date |
| 7334328 | Method of manufacturing axis seals having reduced gas leakage properties and a rotary machine using axis seals In a method of manufacturing an axis seal, first, a roll of rolled metal material is cut into metal material plates of a predetermined size. Next, metal material plates are etched from both sides so as to form a predetermined size. Subsequently, the thin metal plate... | 02/26/2008 |
| 7303380 | Rotary engine with improved seal assembly Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the... | 12/04/2007 |
| 7293778 | Systems and methods for sealing between stators and rotors A seal is used between a housing and a shaft having an axis. The seal includes a first portion and a second portion engageable with each other and movable relative to each other. The first portion and the second portion are configured to be received in a cavity betw... | 11/13/2007 |
| 7275919 | Rotary engine seal assembly Corner seal sockets (26) are formed at the end of apex seal slots (58) formed in a rotor (10). A twisted split washer spring (70) is positioned in each socket (26) between the base wall (28) of the socket (26) and the... | 10/02/2007 |
| 7264454 | Rotary combustion engine with an improved inner seal A rotary combustion engine includes a peripheral housing, a front housing plate, a rear housing plate, a piston, and an eccentric shaft, where the piston rotates to form three working spaces separated from each other by the tips of the piston. Shaft seals and piston... | 09/04/2007 |
| 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 |
| 7234924 | Rotary combustion engine with device for conveying lubricating oil A rotary combustion engine with one or more working units, which include a peripheral housing, a front housing plate, a rear housing plate on the output side, an eccentric shaft, and a piston, where the eccentric shaft includes an eccentric, and front and rear seali... | 06/26/2007 |
| 7134287 | Turbine combustor endcover assembly The endcover assembly for a combustor includes an endcover having an aperture, an insert disposed in the stepped bore opening through an internal face of the endcover, a fuel cartridge extending through the insert and aperture and a seal cover on the external face o... | 11/14/2006 |
| 7029012 | Mechanical seal without elastomers A seal that provides sealing between a rotatable shaft and a housing has a stationary part for connection to the housing and a rotary part for rotation with the shaft. The rotary part includes a sleeve for mounting on the shaft. One end of the sleeve is provided wit... | 04/18/2006 |
| 6575472 | System for sealing relatively movable elements The present invention is directed to a system for providing a fluid seal between relatively movable elements, including a hub or a drum and a piston. A groove for retaining a seal is defined in the periphery of one of the rotatable elements, and a spacer ... | 06/10/2003 |
| 6428010 | Sealing strip A sealing strip is provided for sealing a space between two parts of a machine, for example, a rotary engine. The two parts form a groove for receiving the sealing strip. The sealing strip includes a filler piece, at least one spring element, at least one... | 08/06/2002 |
| 6340160 | System for sealing relatively movable elements The present invention is directed to a system for providing a fluid seal between relatively movable elements, including a hub or a drum and a piston. A groove for retaining a seal is defined in the periphery of one of the rotatable elements, and a spacer ... | 01/22/2002 |
| 6254366 | Replaceable seal having a friction fit A replaceable seal for a rotor in a rotary fluid machine has a unitary body with integrally formed longitudinal and radial seal portions secured by a friction fit in grooves in the rotor. The longitudinal seal portion includes an outwardly biased seal lip... | 07/03/2001 |
| 5794939 | Thin faced balanced seal A mechanical seal 30 is disclosed comprising a sleeve 32 which is adapted to be affixed to the shaft 34 of a item of mechanical equipment, together with a rotary component 42 which carries a rotary seal face 44. Two O-ring grooves 46, 48 are provided on t... | 08/18/1998 |
| 5660399 | Piston rings particularly suited for use with ceramic matrix composite pistons and cylinders A piston ring for use with ceramic matrix composite engine cylinders. In one embodiment, an extra-hard material is used for a conventional ring design. In another embodiment, a hardened edge employing Tungsten Carbide Cobalt is employed. The same edge tre... | 08/26/1997 |
| 5538409 | Trochoidal piston side seal A piston side seal for a multi-lobed piston of a trochoidal rotary engine, consisting of an elongate, resilient metal seal member in the form of a ribbon having first and second opposed side edges wherein in use, the first edge is adapted for lateral loca... | 07/23/1996 |
| 5397224 | Elongated roller side seals for a rotary engine A rotary engine 1 includes a side housing 2, an intermediate housing 12, a rotor housing 3, a rotor 4 accommodated rotatably in the rotor housing 3; side seal grooves 6 formed on both side surfaces 5 and 25 of the rotor 4; springs 8 for urging side seals ... | 03/14/1995 |
| 5350287 | Rotary engine and cam-operated working member assembly A rotary engine includes a stationary engine block and a power shaft mounted along a central axis for rotation with the engine block. An annular working chamber is formed in the engine about the central axis. A working member is connected to the power sha... | 09/27/1994 |
| 4931001 | Apex seal with filled aperture A rotary internal combustion engine includes a rotor with apex seals installed in slots which extend axially through apexes of the rotor. Each apex seal includes at least one passage which extends therethrough in a circumferential direction to equalize ga... | 06/05/1990 |
| 4824125 | Axial seal for a rotary-piston engine An axial sealing arrangement in a rotary-piston engine, comprising a sealing member that is, for example, made of metal, and is inserted into a groove in one surface of an engine component while it bears against the wall of a surface of a second component... | 04/25/1989 |
| 4808096 | Axial sealing system of a rotary piston engine An axial sealing system of a rotary piston engine with a triangular piston and a dual-arc casing runway surfacing with which a seal body arranged in axial groove or groove bore cooperating sealingly after each axial sealing strip at a preceding end thereo... | 02/28/1989 |
| 4797076 | Inner seal of a rotary piston engine An inner seal of a rotary piston engine has a U-shaped base body with legs running along the adjoining housing sidewall. During movement of the piston, the oil adhering along the housing sidewall is conveyed in an opening in the housing sidewall concentri... | 01/10/1989 |
| 4643438 | Axial oil seal of a rotary piston engine An axial oil seal of a rotary piston internal combustion engine of trochoidal type of construction having a housing that consists of two side plates and a two-lobed or dual-curvature mantle runway with an eccentric shaft passing through the housing and in... | 02/17/1987 |
| 4296936 | Seal mechanism for the rotor periphery of a rotary piston engine A seal mechanism for the periphery of the rotor of a rotary piston engine including a sealing ledge supported on the rotor to be pivotable about an axis extending in the longitudinal directional thereof and operative to make sealing contact with an oppose... | 10/27/1981 |
| 4256061 | Two cycle rotary internal combustion engine and cylinder sealing ring arrangement therefor A two-cycle rotary internal combustion engine of the fuel injection type. A rotor having three radially disposed cylinders in equally spaced angular relation in a circular rim rotates in sealed rotation within a cylindrical stationary outer housing. The r... | 03/17/1981 |
| 4243233 | Seal ring having a tapered surface, and a sealing device A novel sealing device of extremely simple and durable construction particularly adapted for use in sealing between the opposed flat end surfaces of two mutually movable members, for example, one for a rotary member and the other for a stationary member. ... | 01/06/1981 |
| 4219315 | Sealing member for orbital or rotary motors An orbital engine has a piston member journalled on a shaft within a housing to orbit therein upon rotation of the shaft. A plurality of vanes form with the housing and piston member a plurality of variable volume chambers. An annular sealing member is mo... | 08/26/1980 |
| 4212473 | Multiple seal ring having a tapered surface, and a sealing device A sealing device especially designed for sealing between the opposed flat surfaces of a stationary member and a rotary member. The device comprises a multiple seal ring composed of a plurality of annular seal elements of different diameter which are recei... | 07/15/1980 |
| 4156586 | Seal for rotary fluid-handling apparatus A seal for rotary pumps, engines, and the like, comprises roller means with variable effective length held in a variable-length supportive body or holder; extension cams maintain longitudinal tolerance of the roller means despite mechanical wear, machinin... | 05/29/1979 |
| 4149835 | Temperature responsive seal lubrication for rotary mechanisms A rotary mechanism including a housing defining an operating chamber having a wall, a shaft journalled in the housing and having an eccentric within the chamber, a rotor within the chamber and journalled on the eccentric, and at least one seal carried by ... | 04/17/1979 |
| 4138124 | Corner seal for rotary piston engines Corner seal for rotary piston engines comprising a substantially cylindrical body which is formed with a groove for accommodating an end of the apex seal. The corner seal has an end surface adapted to be brought into a slidable engagement with the inner s... | 02/06/1979 |
| 4136647 | Rotary device particularly useful as a rotary engine A rotary device particularly useful as a rotary engine comprises a cylinder having two (or more) pairs of axially displaceable pistons, the pistons of each pair being movable towards and away from each other to define an expansible and contractable chambe... | 01/30/1979 |
| 4132417 | Pressure responsive sealing means A sealing device such as a piston ring has an L shaped cross section with primary and secondary sealing surfaces held in contact. The device is mounted in a groove to dispose the primary sealing surface against two relatively movable members and the secon... | 01/02/1979 |
| 4132419 | Oil seal ring for rotary piston engines Oil seal ring comprising a base body and a lip formed thereon. The base body is made of a relatively flexible iron based material such as a cast iron. The lip is made of a mixture of iron-based alloy and one or more carbides by melting and thereafter soli... | 01/02/1979 |
| 4106780 | Seal carrier for rotary piston engine In the embodiment shown, the carrier is of annular configuration having a width of less than the width of a side-seal groove in a rotor, in which groove the carrier is slidably inserted. As the rotor is subject to distortion, an O-ring is interpositioned ... | 08/15/1978 |
| 4087099 | Oil seal means for rotary piston engines In a rotary piston engine comprising a casing having a pair of opposed inner side surfaces, and a rotor disposed in the casing and having opposite side surfaces confronting with said inner side surfaces of the casing, an oil seal assembly is positioned in... | 05/02/1978 |
| 4080120 | Inner seal for rotary piston engines and method of making same An inner or end seal ring for a rotary piston engine and a method of making the seal ring in which an annular sheet metal strip is formed to a U-shape which opens in the axial direction, while an insert ring having radially disposed axially extending part... | 03/21/1978 |
| 4078526 | Rotary piston engine A rotary piston engine whose two pistons each have one or more sectors of greater radial dimensions sealingly engaging inner walls of two cylindrical, intersecting cavities respectively receiving the pistons, and one or more sectors of smaller radial dime... | 03/14/1978 |
| 4068986 | Sealing means for radial faces of piston in orbital piston device Improved sealing means are provided for a motor, engine, or pump having a piston mounted for orbital motion within a cylinder housing, with the housing including radial faces and a plurality of combustion chambers. The improved sealing means are disposed ... | 01/17/1978 |
| 4067671 | Means for locking housing parts against relative movement An apparatus having mating housing parts including a thin metallic sheet disposed at the interface of the housing parts and having multiple, short prongs extending from a side thereof to embed within one of the housing parts to thereby prevent relative mo... | 01/10/1978 |
