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| Number | Title | Issue Date |
| 7510196 | Oil ring for internal combustion engine An oil ring for an internal combustion engine capable of securing an area of an oil-passing hole without deteriorating the strength of the oil ring. To achieve this the oil ring is provided with an oil-passing hole including: two arc portions disposed at both ends i... | 03/31/2009 |
| 7306234 | Oil control ring for pistons of internal combustion engines The invention relates to an oil control ring for pistons of internal combustion engines. The aim of the invention is to provide an improved shape-adaptation capacity in comparison to prior art, with a tangential force that enables the ring to guarantee low friction ... | 12/11/2007 |
| 7306233 | Combined oil control ring In mounting a combined oil control ring in a ring groove formed in a piston, the combined oil control ring is mounted in a form that an opening between but ends of an oil ring body is widened. In such an operation, it is likely that a coil expander falls off the oil... | 12/11/2007 |
| 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 |
| 7086784 | Bearing unit for the hub of a vehicle wheel equipped with a tire inflating system A bearing unit comprises a radially outer stationary race (1) and a pair of radially inner rotatable half-races (2a, 2b). Au intermediate annular chamber (8) is defined between the outer race (1) and the inner half-ra... | 08/08/2006 |
| 7032882 | Valve assembly having novel flow characteristics A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and... | 04/25/2006 |
| 7004476 | Combustion gas seal for injector A combustion gas seal for injectors having the function to prevent the leak of a combustion gas when the injector is mounted on a cylinder head of an engine, wherein the seal is made of a resin and the entire surface of the combustion gas side end of the seal is exp... | 02/28/2006 |
| 6938879 | Valve seal with pressure relief channels and expansion voids A flexible, resilient incompressible seal for a butterfly valve is disclosed formed from a loop having a perimeter mounting surface and a perimeter sealing surface with first and second oppositely disposed axial surfaces extend between the perimeter sealing and moun... | 09/06/2005 |
| 6726217 | Piston ring for the piston of an internal combustion engine The aim of the invention is to prevent deposition of material on the piston ring flank (6) of a piston ring (3) for the piston (1) of an internal combustion engine. To this end, said piston ring is provided with channels (7) which are dis... | 04/27/2004 |
| 6685193 | Self lubricating, non-sealing piston ring for an internal combustion fastener driving tool A non-sealing, lubricating piston ring for lubricating the cylinder wall of a piston housing in a combustion tool is disclosed. The lubricating piston ring is made from a lubricating material such as polytetrofluroethylene (PTFE). The shape of the PTFE ri... | 02/03/2004 |
| 6142393 | Cap seal for lubricant injector A cap assembly for covering an injector of a lubricant metering device to sealingly protect the injector from moisture and dirt. The injector has a generally cylindric body and an end structure narrower than the body projecting endwise from the body. The ... | 11/07/2000 |
| 6129358 | Unidirectional rod sealing ring for a hydraulic cylinder A unidirectional rod sealing ring adapted for forming a sealed condition in association with a member such as a piston rod or shaft axially movable in a bore of a hydraulic cylinder, the sealing ring including an elastomeric ring member having an axially ... | 10/10/2000 |
| 5956956 | Cryogenic refrigerator Occurrence of leakage of refrigerant around a seal member in cryogenic state is suppressed. The seal member 32 is formed from unsaturated polyester-PTFE with an unsaturated polyester mixing ratio of 20% to 35%. A plurality of slits 36 extended axially and... | 09/28/1999 |
| 5676380 | Venting piston ring A venting piston ring is provided with ports extending partly through the ring outer surface which cooperate with the end edge of a cylinder wall to vent the cylinder volume while intermediate surface lands between ports maintain ring to cylinder contact ... | 10/14/1997 |
| 5547203 | Segmented ceramic inlay piston ring A piston ring comprises a generally annular ring body with a series of slots spaced circumferentially about an outer periphery of the ring body, each of the slots extending radially inwardly from the outer periphery. A hinge point is formed between adjace... | 08/20/1996 |
| 5222879 | Contact-less seal and method for making same A contact-less seal apparatus including a first surface and a closely adjacent second surface with a space defined therebetween. A high pressure fluid region exists on a first side of the space. A low pressure fluid region exists on a second side of the s... | 06/29/1993 |
| 5169162 | Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston For carrying out lubrication between a piston (17) and a piston ring (21) installed in an annular groove (23) of the piston, the piston ring comprises a recessed portion (15a, 15b) which is partially recessed from an upper axial end (27) of the piston rin... | 12/08/1992 |
| 5039060 | Control valve vibration damper/isolator A damper/isolator device having four ring segments (38) which are retained in slots (36) in an upper guide (31). The four segments (38) are forced radially outward against a valve bonnet liner (30) and are retained and centered within the slot (36) by ser... | 08/13/1991 |
| 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 |
| 4592559 | Piston ring seal with pressure distribution grooves Seal structure for positioning between two members disposed for sliding relative movement includes a band component that is adapted to be carried by one member and that has a front surface for engagement with the other member and a backup component that i... | 06/03/1986 |
| 4557488 | Hydraulic seal with pressure-actuated ridges An elastomeric seal (1), particularly for mining roof supports, has a circumferentially extending primary sealing ridge (4) for sealing against the cylinder wall (15) at both low and high pressure differentials. In order to provide lubrication of the prim... | 12/10/1985 |
| 4147274 | Floating roof tank seal A rim seal is provided for a floating roof tank to fill the space between the floating roof and circumferential wall of the tank. The seal is a compressible toroid of approximately the diameter of the tank and has a cross-sectional diameter greater than t... | 04/03/1979 |
