| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 07/31/2013 | CN103225566A Non-oil-stick triple-combination piston oil ring and fabrication method thereof |
| 07/25/2013 | DE102011108357B4 Verfahren zur Herstellung eines Ölabstreifkolbenrings A method for producing a Ölabstreifkolbenrings |
| 07/24/2013 | CN203081603U Labyrinth piston ring |
| 07/24/2013 | CN103216354A Piston ring of internal combustion engine |
| 07/24/2013 | CN101978085B Piston ring material for internal combustion engine |
| 07/17/2013 | CN103206314A Piston Ring With Improved Lubrication Delivery |
| 07/11/2013 | DE102013200134A1 Kolbenring mit verbesserter Schmiermittelabgabe Piston ring with improved lubricant delivery |
| 07/10/2013 | CN103195605A Piston ring with solid lubrication coating |
| 07/10/2013 | CN103195604A Piston ring with non-stick coating |
| 06/26/2013 | EP2607675A1 Oil-reserving piston ring |
| 06/26/2013 | CN103174540A Lubrication system of piston ring of internal-combustion engine and upper portion scraper ring of adjacent cylinder sleeve |
| 06/26/2013 | CN103174512A Two-stroke engine with oil ring |
| 06/19/2013 | CN203009068U Engine piston ring assembly |
| 06/13/2013 | US20130147124 Oil-reserving piston ring |
| 06/12/2013 | CN202991256U High-elasticity scraping ring |
| 06/12/2013 | CN103147872A Fully-sealed piston and piston ring |
| 06/12/2013 | CN103147871A Piston and cylinder assembly for reciprocating compressor combustion machine and method for removing deposits from piston |
| 06/05/2013 | CN202970937U Seamless totally closed piston ring |
| 06/05/2013 | CN202970936U Nitrided scraping blade |
| 05/29/2013 | DE102011087256A1 Brennkraftmaschine mit einer Anordnung zur Rückführung von Abgas und Zuführung von gekühlter Ladeluft Internal combustion engine with an arrangement for recirculation of exhaust gas and supplying cooled charge air |
| 05/22/2013 | CN202946258U Novel piston ring |
| 05/22/2013 | CN202946257U Piston ring |
| 05/22/2013 | CN103114926A Complementary type piston oil ring |
| 05/22/2013 | CN103114925A Complementary type piston compression ring |
| 05/16/2013 | WO2013069349A1 Combination oil ring |
| 05/16/2013 | US20130119614 Compensating and sealing rings for pistons of engines, compressors, exhausters and pumps |
| 05/15/2013 | CN202937363U Carbinol-corrosion-resistant piston mechanism |
| 05/10/2013 | WO2013065652A1 Piston ring |
| 05/08/2013 | CN202926483U Combined type piston ring |
| 05/08/2013 | CN103089479A Wear-resisting piston ring with hard-soft composite coating and textured surface and wear-resisting piston ring manufacture method |
| 05/08/2013 | CN103089478A Gaseous multi-component cementation piston ring |
| 05/08/2013 | CN101929405B Piston ring of chrome-base ceramic composite plating layer |
| 05/02/2013 | WO2013062045A1 Piston ring |
| 04/24/2013 | CN202900435U Automobile engine oil ring body |
| 04/24/2013 | CN103061914A Piston ring coated with wear-resistant layer on surface and surface processing process of piston ring |
| 04/18/2013 | WO2013054807A1 Combined oil control ring |
| 04/17/2013 | CN202883150U Novel piston ring |
| 04/17/2013 | CN202883149U Air-cooled diesel engine |
| 04/17/2013 | CN103052833A 活塞环 Piston |
| 04/11/2013 | DE102011084052A1 Coated piston ring for use in combustion engine such as reciprocating piston engine, has base body whose outer circumferential surface and flank surface form outer edge, which exhibits ridge or ablation having specific range width |
| 04/11/2013 | DE102011084051A1 Coated piston ring for use in internal combustion engine, has metallic base unit with outer peripheral surface and flank surfaces that are provided partly with electrochemically deposited metallic wear protection layer |
| 04/10/2013 | EP2578909A1 Pressure ring and method for producing the same |
| 04/10/2013 | EP2578908A1 Oil ring for internal combustion engine |
| 04/10/2013 | EP2576858A1 Sliding element |
| 04/10/2013 | CN202867020U Piston ring with ceramic two-phase structure coating |
| 04/10/2013 | CN202867019U Piston ring with nano ceramic coating |
| 04/10/2013 | CN202866996U 5.9-litre diesel engine |
| 04/10/2013 | CN103032197A Piston oil-return structure of horizontal opposed piston two-stroke internal combustion machine |
| 04/10/2013 | CN101482070B Piston ring group of internal combustion engine |
| 04/04/2013 | DE102011083714A1 Gleitelement mit DLC-Beschichtung Slider with DLC coating |
| 04/04/2013 | DE102010050598B4 Verfahren zur Herstellung eines Kolbenrings sowie danach hergestellter Kolbenring A process for producing a piston ring and piston ring produced thereafter |
| 04/03/2013 | CN202851185U High efficient and energy-saving engine |
| 04/03/2013 | CN202851184U Segment-positioned radial-axial full-sealing piston ring |
| 04/03/2013 | CN103016201A Labyrinth type piston ring |
| 04/03/2013 | CN103016200A Piston ring for engine and manufacturing method thereof |
| 03/28/2013 | DE102011089284A1 Kolbenring für einen Verbrennungsmotor und Herstellungsverfahren dafür Piston ring for an internal combustion engine, and processes for its preparation |
| 03/27/2013 | CN102996241A Double piston type four-stroke internal combustion engine |
| 03/26/2013 | US8403334 Multi-rail piston ring |
| 03/20/2013 | CN202811048U Gasoline engine and automobile |
| 03/14/2013 | US20130062835 Compression ring and its production method |
| 03/06/2013 | CN202768818U Self-control type piston ring |
| 03/06/2013 | CN202768816U Leakproof piston ring set |
| 03/06/2013 | CN102959124A Sliding element |
| 03/06/2013 | CN102953861A High-adaptability scraping ring |
| 02/27/2013 | EP2562448A1 Oil ring for internal combustion engine |
| 02/27/2013 | CN202756110U I-type oil ring with ultra-hard arc ion multi-composite metal ceramic plating on external circle |
| 02/20/2013 | CN202746579U Totally closed piston ring set |
| 02/20/2013 | CN202746031U Novel piston oil ring |
| 02/20/2013 | CN102939482A Oil ring for internal combustion engine |
| 02/13/2013 | CN202732143U Gasoline engine piston ring |
| 02/13/2013 | CN202732142U Durable environment-friendly piston ring |
| 02/13/2013 | CN202732141U Novel molybdenum spray piston ring for automobiles |
| 02/13/2013 | CN202732140U 卡簧式活塞环 Spring type piston ring |
| 02/13/2013 | CN202732139U Automobile engine piston oil ring |
| 02/13/2013 | CN202732134U Novel wear-resistant piston |
| 02/13/2013 | CN202732133U Piston with double piston rings |
| 02/13/2013 | CN202732132U Improved piston for internal-combustion engine |
| 02/13/2013 | CN102922469A Diesel engine cylinder sleeve wearing ring and dismounting tool thereof |
| 02/07/2013 | US20130032119 Two-piece compression piston ring of an internal combustion engine |
| 02/07/2013 | DE102012213586A1 Zweiteiliger kompressionskolbenring eines verbrennungsmotors Two-piece compression piston ring an internal combustion engine |
| 02/06/2013 | CN102913339A Two-piece compression piston ring of an internal combustion engine |
| 02/06/2013 | CN102913338A Engine |
| 01/30/2013 | EP2551504A1 Piston and oil distribution ring for a stroke piston combustion engine |
| 01/30/2013 | EP2551503A1 Piston, piston ring and oil distribution ring for a stroke piston combustion engine |
| 01/30/2013 | CN202707273U Piston ring |
| 01/30/2013 | CN202707272U Doctor blade ring of excircle superhard electric arc multielement composite metal ceramic clad layer |
| 01/30/2013 | CN102906470A Pressure ring and method for producing same |
| 01/30/2013 | CN102900560A Diamond-like carbon membrane piston ring |
| 01/30/2013 | CN102900559A Piston, piston ring and oil distribution ring for a stroke piston combustion engine |
| 01/24/2013 | DE102012004757A1 Ölabstreifring Oil ring |
| 01/24/2013 | DE102011108357A1 Method for producing oil control piston ring, involves packetizing of multiple basic bodies on mandrel, and manipulating basic body, which results in uniform cylindrical outer peripheral surface within package |
| 01/23/2013 | CN202690244U Anti-leakage sealing piston ring |
| 01/23/2013 | CN202690243U Arc-shaped and conical-surface piston oil ring |
| 01/16/2013 | CN202673475U Diamond-like carbon-film piston ring |
| 01/16/2013 | CN102877978A Anti-leakage sealing piston ring |
| 01/10/2013 | DE102011106656A1 Ölabstreifring für einen Kolben eines Verbrennungsmotors Oil scraper ring for a piston of an internal combustion engine |
| 01/10/2013 | DE102011106545A1 Device for supporting piston at e.g. two-stroke internal combustion engine, has control unit for conveying gas from working area to pressure-sided area over holes, where pressure-sided area is formed between ring and cylinder surface |
| 01/03/2013 | US20130004756 Sliding element, in particular a piston ring, and method for coating a sliding element |
| 01/02/2013 | CN202645764U Piston assembly |
| 01/02/2013 | CN102859241A Oil ring for internal combustion engine |