| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 02/07/1996 | CN1116275A 活塞环 Piston |
| 01/06/1996 | CA2153017A1 Piston assembly having abradable coating |
| 01/03/1996 | EP0690250A1 Cylinder unit and method for forming the sliding surfaces thereof |
| 12/27/1995 | EP0688982A1 Segmented ceramic inlay piston ring |
| 12/27/1995 | CN1114000A Cylinder combined piston and sealing method |
| 11/29/1995 | CN2213860Y Sealed damping piston ring |
| 11/28/1995 | US5469777 Piston assembly having abradable coating |
| 10/11/1995 | EP0676569A1 Low emission piston ring |
| 09/19/1995 | US5450783 Low emission piston ring |
| 09/13/1995 | EP0670960A1 Piston-cylinder assembly of an internal combustion engine. |
| 09/13/1995 | CN2207483Y Piston air ring |
| 07/18/1995 | US5433001 Method of producing piston ring |
| 07/12/1995 | CN2203362Y High-elastic piston ring for IC engine |
| 07/05/1995 | CN2202801Y Long-service gapless piston ring |
| 06/27/1995 | US5427633 Slide surface construction |
| 05/04/1995 | WO1995012079A1 Width-reduced three-piece oil ring |
| 04/19/1995 | CN2194983Y 节能活塞环 Saving piston ring |
| 04/12/1995 | EP0647804A1 Internal combustion engine |
| 03/02/1995 | DE4430027A1 Piston ring |
| 02/28/1995 | US5394015 Method of producing sintered silicon nitrides |
| 12/27/1994 | US5376194 Slide surface construction having oriented F.C.C. metal layer |
| 12/21/1994 | CN2185805Y Eccentric piston ring |
| 12/21/1994 | CN1096565A Interference assembling technique for engine |
| 12/14/1994 | CN1096344A Energy-saving piston ring |
| 12/08/1994 | DE4419713A1 Bearing element and process for its production |
| 12/07/1994 | CN2184790Y 组合式活塞环 Combined Piston |
| 11/17/1994 | EP0624657A1 A slide member made of an aluminium alloy |
| 11/09/1994 | CN1026514C Sealing of filler box of cylinder rod |
| 11/02/1994 | CN2181574Y Double gas ring piston |
| 11/02/1994 | CN1094490A A piston top ring for an internal combustion engine |
| 10/05/1994 | CN2178786Y Spiral anti-turn no-clearance piston ring and ring groove and adaption |
| 09/14/1994 | CN2177099Y Oblique cross butt joint anti-leakage piston ring |
| 09/07/1994 | EP0473737B1 Stuffing box seal for piston rods |
| 08/17/1994 | CN2174570Y Zero type split piston ring group |
| 08/10/1994 | CN1025638C Cylinder jacket made of Cr-V-Ti cast iron |
| 07/13/1994 | CN2171685Y Combined airtight piston ring |
| 07/13/1994 | CN2171684Y Piston with compound ring |
| 07/13/1994 | CN2171683Y Whole-sealed piston ring |
| 07/06/1994 | EP0605223A1 Gas nitrided piston ring |
| 07/06/1994 | CN2171010Y Complex piston ring |
| 06/16/1994 | DE4342072A1 Sliding surface having excellent scuff-resistance - comprises a face-centred cubic nickel crystal aggregate of pyramidal or truncated pyramidal structure |
| 06/11/1994 | CA2111023A1 Slide surface construction |
| 06/09/1994 | WO1994012815A1 A piston top ring for an internal combustion engine |
| 06/09/1994 | WO1994012783A1 Piston-cylinder assembly of an internal combustion engine |
| 06/09/1994 | DE4341287A1 Sliding surface consisting of face-centred cubic nickel crystal aggregate - of tetrahedral structure has excellent scuff-resistance and is used in mfr. of e.g. cam shaft pivot bearings |
| 06/01/1994 | DE4240050A1 Kolben-Zylinder-Vorrichtung eines Verbrennungsmotors Piston-cylinder-device of a combustion engine |
| 05/25/1994 | CN2166237Y Automatic detection for piston ring quality of internal combustion engine and its automatic sorting unit |
| 05/25/1994 | CN2166236Y Expansion piston ring |
| 05/18/1994 | CN2165234Y Automatic seal piston |
| 05/04/1994 | EP0595075A2 Microlaminated composites and method for preparing them |
| 05/03/1994 | US5308089 Combined oil ring |
| 04/27/1994 | EP0495129B1 Reciprocating engine |
| 04/06/1994 | CN2160763Y 组合式活塞环 Combined Piston |
| 04/06/1994 | CN1084901A Niobium casting iron cylinder jacket and piston ring for railway inner combustion locomotive |
| 03/22/1994 | US5295696 Combined oil ring |
| 02/16/1994 | CN1082144A Non-interval piston group |
| 02/09/1994 | CN1081742A Rare earth surface treatment technology for piston and piston ring |
| 01/26/1994 | CN2154354Y Super-long join piston ring |
| 01/26/1994 | CN2154353Y Pisten device |
| 01/19/1994 | EP0579509A1 Method of producing sintered silicon nitrides |
| 01/05/1994 | CN2152085Y Piston ring for ic engine pressure increase |
| 11/30/1993 | US5265565 Reciprocating engine |
| 11/24/1993 | CN2147360Y 活塞环 Piston |
| 11/17/1993 | CN2146574Y 组合式活塞环 Combined Piston |
| 10/19/1993 | US5253878 Compression ring for internal-combustion engines |
| 07/07/1993 | CN2137721Y Two-layer piston ring |
| 06/09/1993 | CN1072993A Piston ring for engine and its processing method |
| 06/02/1993 | EP0544459A1 Piston ring assembly |
| 05/12/1993 | CN2132839Y Opening lapping piston ring |
| 05/05/1993 | CN2131993Y Combined z-type airtight ring |
| 04/20/1993 | US5203294 Horizontal cylinder arrangement for an internal combustion engine |
| 04/06/1993 | US5199722 Seal assembly for stirling engine |
| 03/16/1993 | US5193820 Three-piece type oil ring assembly |
| 02/03/1993 | CN1068626A Automatic position-moving and opening proof piston ring |
| 12/23/1992 | CN2125713U Closed piston ring |
| 11/04/1992 | EP0416046B1 Piston rings |
| 10/07/1992 | EP0507636A1 Combined oil ring |
| 10/07/1992 | CN2118164U Out-of-phase opening self-position piston ring |
| 09/16/1992 | CN2116102U Piston assembly with two rings in single slot |
| 09/16/1992 | CN1018274B Piston and piston ring assembly |
| 08/26/1992 | CN2114032U Closed piston compression ring |
| 07/28/1992 | US5133563 Two ring piston with lower tapered L-shaped ring |
| 07/22/1992 | EP0495129A1 Reciprocating engine |
| 07/08/1992 | CN2109455U Piston with combined piston ring |
| 07/08/1992 | CN1062579A Cylinder jacket made of cr-v-ti cast iron |
| 06/03/1992 | EP0305504B1 High pressure reciprocator components |
| 05/06/1992 | CN2103652U Energy-saving closed piston and piston ring assembly |
| 04/14/1992 | US5104132 Piston ring having nitriding layer and composite ni-b plating layer |
| 04/01/1992 | CN2100494U Piston, piston ring assembly |
| 03/04/1992 | CN1059186A Thrust augmentation piston ring with no lateral gap |
| 02/20/1992 | WO1992002722A1 Reciprocating engine |
| 02/12/1992 | CN2095943U Piston ring of diesel engine |
| 01/15/1992 | CN2093244U Piston ring for internal-combustion engine |
| 01/08/1992 | CN2092609U Automatically gap adjusting rings for internal-combustion engine pistons |
| 01/02/1992 | EP0463146A1 Piston ring device for piston reciprocating machines, mainly for internal combustion engines |
| 12/27/1991 | EP0462358A1 Lubricating oil permeable cylinder wall ring |
| 12/17/1991 | US5072653 Piston for a reciprocating machine including a split piston ring |
| 11/27/1991 | CN2089529U Composite piston ring |
| 11/12/1991 | US5064206 Piston ring |
| 10/09/1991 | CN1055220A Sealing elements of stuffing-box for piston rod |