| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 05/15/2002 | CN2491611Y Omnidirectional enclosed energy saving piston ring |
| 05/15/2002 | CN2491610Y Clearence mutually enclosed sealing ring |
| 05/08/2002 | CN2490324Y Limit sealing piston ring |
| 05/01/2002 | CN2489103Y Automatic gap-adjustment speical-shaped piston ring |
| 04/25/2002 | DE10149127A1 First piston compression ring has optimum relationship between ID and radial distance between inside and outside circumferential faces, and between ID and axial length of outside circumferential face |
| 04/25/2002 | DE10046956A1 Thermisch aufgetragene Beschichtung für Kolbenringe aus mechanisch legierten Pulvern Thermal spray coating for piston rings from mechanically alloyed powders |
| 04/24/2002 | CN1083530C A piston for a two-stroke crosshead engine of the diesel type |
| 04/18/2002 | US20020043769 Oil scraper piston ring having circumferentially distributed recesses |
| 04/16/2002 | US6372369 Hard film, sliding member covered with hard film, and manufacturing method thereof |
| 04/11/2002 | US20020041071 Compression piston ring |
| 04/10/2002 | CN1344334A Process for electrolytic coating of substrate |
| 04/10/2002 | CN1343837A Combined O-shaped pressure ring |
| 04/03/2002 | CN2484413Y Contra-aperture double lap jointikng piston ring |
| 04/03/2002 | CN1082159C Piston ring for combustion engines |
| 03/28/2002 | WO2002024970A2 Thermally applied coating for piston rings, consisting of mechanically alloyed powders |
| 03/21/2002 | US20020033579 Piston ring |
| 03/19/2002 | US6358628 Slide member made of an aluminum alloy |
| 03/14/2002 | DE10041803A1 Ölabstreifkolbenring Piston oil control ring |
| 03/13/2002 | CN1080821C Internal combustion engine having coke scraping ring in cylinder |
| 03/06/2002 | EP1184558A1 Piston and piston ring assembly |
| 03/05/2002 | USRE37565 Piston-cylinder assembly |
| 02/28/2002 | US20020023609 Piston for a four-stroke internal combustion engine |
| 02/28/2002 | DE10041802C1 Kompressionskolbenring Compression piston ring |
| 02/27/2002 | EP1182384A2 Oil scraping ring |
| 02/27/2002 | EP1182383A2 Compression piston ring |
| 02/27/2002 | CN2479231Y Supercharged double-ring complementary piston ring |
| 02/27/2002 | CN2479230Y Double-sealed piston ring |
| 02/27/2002 | CN1079901C Forced-sealing oil ring |
| 02/20/2002 | CN2477841Y I.C. engine piston and piston ring assembly |
| 01/29/2002 | US6341782 Lubricated seals having micropores |
| 01/24/2002 | WO2002006546A1 Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing the same, and combination of piston ring and cylinder block |
| 01/23/2002 | CN2473346Y High seal piston ring |
| 01/16/2002 | EP0866933B1 Piston-cylinder assembly |
| 01/16/2002 | CN2471943Y Interassisting energy saving and environment protecting piston ring |
| 01/09/2002 | EP1170470A2 Internal combustion engine |
| 12/26/2001 | CN2467808Y Round oil drainhole cast iron oil ring for internal combustion engine |
| 12/26/2001 | CN1328208A Two rings combined full-sealing piston ring |
| 12/12/2001 | EP0931172B1 Coated wear resisting piston rings for internal combustion engines and method for their production |
| 12/12/2001 | CN2464948Y Reinforced laminated sealing piston ring |
| 12/05/2001 | CN2463549Y Plane bevel joint piston ring |
| 11/28/2001 | CN2462091Y Combined oil ring of diesel engine |
| 11/28/2001 | CN1075594C Piston assembly |
| 11/21/2001 | CN2460731Y Sealed piston ring of internal-combustion engine |
| 11/15/2001 | US20010040346 Piston ring assembly |
| 11/14/2001 | CN2459450Y Occlosion type piston ring |
| 11/13/2001 | US6315840 Sliding member |
| 11/07/2001 | CN2458427Y Piston ring |
| 11/07/2001 | CN1320767A Nm-class Ti-base ceramic covered piston ring and its method |
| 10/31/2001 | CN2457351Y Self sealing mutual compensation energy saving environment protection piston ring |
| 10/24/2001 | CN1073669C Forceful sealing oil ring |
| 10/18/2001 | WO2001077548A1 Three piece type oil control ring |
| 10/17/2001 | CN2454552Y Energy-saing steel combined ring oiled of diesel engine |
| 10/17/2001 | CN1317637A Efficient sealed piston with two ring sets and piston ring assembly |
| 10/10/2001 | EP1141593A1 Piston ring for the piston of an internal combustion engine |
| 10/10/2001 | CN2453142Y Automatic mouth-sealing ring |
| 09/27/2001 | DE10002282C1 Verfahren zur Herstellung eines Ölabstreifkolbenringes, sowie ein nach diesem Verfahren hergestellter Ölabstreifkolbenring A method for producing a piston oil control ring, and a piston oil control ring produced according to this method |
| 09/26/2001 | CN2450397Y Openingless piston ring with inserter |
| 09/26/2001 | CN1071845C Seal device for piston-cylinder unit |
| 09/19/2001 | CN2448934Y Self-controlled piston ring device |
| 09/13/2001 | WO2001066982A1 Lubricated seals having micropores |
| 09/12/2001 | CN2447530Y Ladder gate-sealing holeless pistol ring |
| 09/12/2001 | CN2447529Y Mortise pistol ring |
| 09/12/2001 | CN1312431A Combined sealed piston ring |
| 09/04/2001 | US6283478 Piston ring structural body and method of mounting the piston ring structural body |
| 08/08/2001 | CN2441986Y Inter-assist type energy saving environment protection piston ring |
| 08/07/2001 | US6270081 Combination of piston ring for use in internal combustion engine |
| 08/01/2001 | CN2440950Y Gapless piston ring |
| 07/31/2001 | US6267384 Thin 3-piece oil ring |
| 07/26/2001 | WO2001053727A1 Oil-scraper piston ring and a method for producing an oil-scraper piston ring |
| 07/12/2001 | WO2001049997A1 Internal combustion engines |
| 07/12/2001 | WO2001049980A1 Internal combustion engine with valve control |
| 07/11/2001 | CN2438837Y Plugging piston ring |
| 07/11/2001 | CN1068412C 活塞环 Piston |
| 07/10/2001 | US6257590 Sealing structure and method of mounting piston ring structural body for use in the sealing stucture |
| 07/04/2001 | CN2437865Y Compound piston ring |
| 06/27/2001 | CN2436662Y Combined telescopic piston ring |
| 06/20/2001 | CN2435526Y Improved piston assembly |
| 06/13/2001 | CN2434438Y Overlapped double ring of piston |
| 06/07/2001 | US20010002744 Combination of piston ring for use in internal combustion engine |
| 05/22/2001 | US6235415 Chromium nitride |
| 05/15/2001 | US6232003 Sliding member |
| 05/10/2001 | WO2001032948A1 Method and device for producing machine components that are provided with at least one sliding surface |
| 05/02/2001 | CN2428587Y Combined piston ring |
| 05/02/2001 | CN2428584Y Gas-loop of piston ring of IC engine |
| 04/25/2001 | CN2427635Y Self gap adjusting and lubricating piston ring |
| 04/18/2001 | EP1092898A2 Oil control ring for internal combustion engine with dynamically stabilized side rail |
| 04/18/2001 | CN1064719C Cast iron and piston ring |
| 04/10/2001 | US6213474 Chromium carbide steel formed by nitriding surface treatment; facilitated bending work during manufacture which prevents ring breakage; for internal combustion engines, and/or large diesel engines |
| 04/04/2001 | CN2426021Y Complementary energy-saving environment protection type piston ring |
| 04/03/2001 | US6209881 Cast-iron piston ring |
| 03/28/2001 | EP1087031A2 Hard film, sliding member covered with hard film and manufacturing method thereof |
| 03/28/2001 | CN2425204Y Totally enclosed piston ring |
| 03/27/2001 | US6205908 Piston equipped with piston ring |
| 03/21/2001 | EP1085242A2 Piston ring |
| 03/15/2001 | WO2001018434A1 Piston ring for a reciprocating piston machine |
| 03/15/2001 | DE19942241A1 Hubkolbenmaschine Reciprocating engine |
| 03/14/2001 | CN2423416Y combination piston ring |
| 03/13/2001 | US6199868 Piston assembly with piston ring support and sealing member |
| 03/13/2001 | US6199274 Method of making oil scraper piston rings |
| 03/07/2001 | CN2422458Y Twisted sealed oil-saving piston ring |