| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 10/19/2011 | CN101611249B Pistons for internal combustion engines |
| 10/05/2011 | CN202001134U Combined type piston compression ring |
| 10/05/2011 | CN202001133U Ceramic penetration piston gas ring with sealing sheet |
| 10/05/2011 | CN101205849B Piston with oil collector ring |
| 09/21/2011 | CN102192322A Combination oil ring |
| 09/15/2011 | DE102010002688A1 Schraubendruckfeder für einen Ölabstreifring eines Kolbens in einem Verbrennungsmotor und Verfahren zur Beschichtung einer Schraubendruckfeder Helical compression spring for an oil scraper ring of a piston in an internal combustion engine and method for coating a helical compression spring |
| 09/15/2011 | DE102010002687A1 Verfahren zur Beschichtung zumindest der Innenfläche eines Kolbenrings sowie Kolbenring A method of coating at least the inner surface of a piston ring and piston ring |
| 09/15/2011 | DE102010002686A1 Gleitelement, insbesondere Kolbenring, und Verfahren zur Beschichtung eines Gleitelements Sliding element, in particular piston ring, and methods for coating a sliding member |
| 09/14/2011 | CN102182580A Ceramic-infiltrated piston ring and ceramic infiltration method thereof |
| 09/07/2011 | CN201963414U 一种由原缸机活塞改造的加长活塞 One kind of transformation of the original piston-cylinder engine piston extension |
| 08/31/2011 | CN102168627A Piston ring set with high wear resistance |
| 08/25/2011 | DE102010008924A1 Verfahren zur Herstellung von Kolbenringen A process for the production of piston rings |
| 08/24/2011 | CN201943836U Diamond-like carbon gradient-coating piston ring |
| 08/24/2011 | CN201943835U 具有pvd镀层的活塞环 Piston has pvd coating |
| 08/24/2011 | CN102162407A A piston ring set |
| 08/17/2011 | CN102155327A Piston ring capable of sealing air cylinder |
| 08/11/2011 | WO2011094906A1 End-unsymmetrical complementary close-type abrasion-resistant piston ring |
| 08/10/2011 | CN201925041U 一种活塞环组 One kind of piston ring set |
| 08/04/2011 | WO2011093464A1 Piston ring |
| 08/04/2011 | DE102010001434A1 Ölabstreif-Kolbenring Oil control piston ring |
| 08/03/2011 | CN201916069U 内燃机活塞与活塞环组件 Internal combustion piston and piston ring assembly |
| 08/03/2011 | CN102141149A Tail end asymmetric complementary closed-type wear-resisting piston ring |
| 07/27/2011 | CN201908740U Piston ring embedded with pure oxide ceramic |
| 07/27/2011 | CN101619764B Joint type magnetic piston ring |
| 07/21/2011 | DE102010004684A1 Zylinderformoptimierter Kolbenring und Brennkraftmaschine Cylindrical shape optimized piston ring and the internal combustion engine |
| 07/20/2011 | CN102128100A Gasoline engine |
| 07/13/2011 | CN102121428A Air-tight piston ring |
| 07/06/2011 | CN201891522U Novel oil ring scraping sheet positioning mechanism |
| 07/06/2011 | CN201891521U Anti-breaking sealing piston ring |
| 07/06/2011 | CN102116213A L-shaped piston ring of internal combustion engine |
| 06/22/2011 | DE102009059657A1 Kolben-Kolbenring-Anordnung Piston and piston ring assembly |
| 06/22/2011 | CN201874693U Energy saving and environment friendly general gasoline engine |
| 06/22/2011 | CN102102594A Air cylinder capable of reducing energy attenuation |
| 06/16/2011 | WO2011071117A1 Coating composition for engine parts and engine part using same |
| 06/16/2011 | WO2011071049A1 Piston ring and piston device |
| 06/15/2011 | CN201865783U Novel gasoline engine |
| 06/15/2011 | CN102094724A 钢质活塞环 Steel piston ring |
| 06/14/2011 | CA2674151C Two-stroke engine |
| 06/08/2011 | EP2329911A1 Method and device for clamping piston rings during the assembly of the connecting rod, pin and piston group in the cylinder of the engine block of a vehicle |
| 06/08/2011 | CN1912163B High temperature erosion endurable work piece, reciprocating piston internal combustion engine having the same and use of alloy for protection against erosion of high temperature |
| 06/08/2011 | CN102086819A Double-closed combined compression ring for reciprocating piston internal combustion engine |
| 06/03/2011 | WO2011064888A1 Piston ring |
| 06/01/2011 | CN101070796B Method for forcibly changing rotating position of piston ring and cross-type two-stroke diesel engine |
| 05/26/2011 | WO2011060521A1 Compensating and sealing rings for pistons of engines, compressors, exhausters and pumps |
| 05/25/2011 | CN102072042A Hermetic piston ring |
| 05/25/2011 | CN102072041A Lightweight piston for motorcycle engine |
| 05/25/2011 | CN101403348B Piston ring of reciprocating engine |
| 05/18/2011 | CN201835939U Oil ring of piston ring group for engine |
| 05/18/2011 | CN201835938U Novel piston ring pack for liquefied petroleum gas fuel engine |
| 05/18/2011 | CN201835937U Piston ring set for passenger car diesel engine |
| 05/18/2011 | CN201835936U Engine piston leak-proof device |
| 05/18/2011 | CN102066817A Oil ring and piston for internal combustion engine |
| 05/18/2011 | CN102061979A Gasoline engine |
| 05/11/2011 | CN201826969U Piston ring of internal-combustion engine |
| 05/05/2011 | US20110100318 Oil ring and piston for an internal combustion engine |
| 05/05/2011 | DE102005022469B4 Brennkraftmaschine mit einem Zylinderkurbelgehäuse Internal combustion engine having a cylinder crankcase |
| 05/04/2011 | CN201818784U Trinity inclined-plane combined piston ring |
| 05/04/2011 | CN201818384U Piston ring for DLC (diamond-like carbon) coating |
| 05/04/2011 | CN201818383U Piston ring |
| 05/04/2011 | CN102042401A Piston and piston ring group |
| 05/04/2011 | CN102042118A Application of engine closed-loop port gap technology |
| 04/27/2011 | CN201810413U Piston ring for internal combustion engine |
| 04/14/2011 | WO2011043364A1 Oil ring for internal combustion engine |
| 04/07/2011 | WO2011040066A1 Combined oil ring |
| 04/07/2011 | DE102009048172A1 Piston for internal combustion engine of motor vehicle, has switchable valve device arranged at inner side at piston skirt and adjusting volume of pressurized medium in chamber, where valve device is designed as shut-off valve |
| 04/06/2011 | CN101526046B Piston ring |
| 03/30/2011 | CN101994829A Energy-saving piston ring |
| 03/30/2011 | CN101994598A Piston for engine having stable behavior of piston ring |
| 03/23/2011 | CN201771624U Piston ring |
| 03/23/2011 | CN201771623U Detachment-convenient piston ring positioning pin device |
| 03/16/2011 | CN201763460U Piston ring with good tightness |
| 03/09/2011 | EP2292952A1 Oil ring and piston for internal combustion engine |
| 03/09/2011 | CN201757010U Structure of engine piston |
| 03/09/2011 | CN101984242A Energy-saving and environmental-friendly engine |
| 03/02/2011 | CN201753639U Piston set with full seal piston rings |
| 02/23/2011 | CN201751557U Piston of small-displacement engine |
| 02/17/2011 | US20110036322 Piston for engine having stable behavior of piston ring |
| 02/16/2011 | CN201747474U Bayonet piston ring |
| 02/16/2011 | CN101978085A Piston ring material for internal combustion engine |
| 02/16/2011 | CN101975119A Novel internal-combustion engine |
| 02/16/2011 | CN101972850A Method for producing centrifugal plasma metallurgical high-red rigid piston ring |
| 02/09/2011 | CN201739020U Piston ring |
| 02/03/2011 | DE19826323B4 Dichtungsanordnung Seal assembly |
| 01/26/2011 | CN101956628A Piston for a cylinder of a large motor, lubricating device and method with such a piston |
| 01/20/2011 | DE102009032940A1 Piston-piston ring assembly for internal combustion engine, comprises piston top which is provided with piston ring in annular groove, where piston ring has circumferential line |
| 01/20/2011 | DE102009032937A1 Ring carrier blank for piston for internal combustion engine, comprises internal circulating lateral surface with two, particularly four radial recesses lying opposite to each other |
| 01/19/2011 | CN201714506U Novel diesel piston |
| 01/18/2011 | US7870819 Piston device and manufacturing method thereof |
| 01/13/2011 | DE102009049788B3 Mehrteiliger Kolbenring Multi-part piston ring |
| 01/13/2011 | DE102006024414B4 Kolbenringe und Zylinderlaufbuchsen Piston rings and cylinder liners |
| 01/13/2011 | DE102005051223B4 Ölabstreifring Oil ring |
| 01/12/2011 | CN201705491U Piston ring structure |
| 01/12/2011 | CN101943039A Improvement on ignition and lubrication of gasoline engine for lawn mower |
| 01/12/2011 | CN101389886B Sliding member |
| 01/12/2011 | CN101100963B Piston ring for internal combustion engines |
| 12/29/2010 | CN101929545A Rupture-preventing sealing piston ring |
| 12/29/2010 | CN101929405A Piston ring of chrome-base ceramic composite plating layer |
| 12/22/2010 | CN101922377A Piston ring and manufacturing method thereof |
| 12/15/2010 | CN201671720U Engine piston ring gas ring with soft wear-resistant alloy ring |
| 12/15/2010 | CN201671719U Stepping type piston ring for internal combustion engine |