| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 08/21/2003 | US20030154947 Piston assembly having counterflow thwarting construction for use in an internal combustion engine |
| 08/20/2003 | EP1141593B1 Piston ring for the piston of an internal combustion engine |
| 08/20/2003 | CN1437678A Internal combustion engines |
| 08/20/2003 | CN1437676A Internal combustion engine with valve control |
| 08/13/2003 | EP1333949A1 Method of producing by casting a piston with a cooled ring carrier |
| 08/06/2003 | CN1117230C Piston ring for piston in I.C. engine |
| 07/17/2003 | WO2003058096A1 Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumption |
| 07/16/2003 | CN2560765Y Piston ring |
| 07/10/2003 | WO2003021137A3 Cooled ring carrier for a piston |
| 07/09/2003 | EP1325252A1 Two piece oil control ring with nitrided surface layers |
| 07/09/2003 | EP1230413B1 Method for producing machine components that are provided with at least one sliding surface |
| 07/02/2003 | EP1322794A2 Thermally applied coating for piston rings, consisting of mechanically alloyed powders |
| 07/02/2003 | CN2558776Y Reverse twisted ceramal piston ring |
| 07/02/2003 | CN1427144A Piston ring |
| 06/25/2003 | CN2557708Y Assembling piston ring |
| 06/25/2003 | CN2557707Y Oil ring for piston ring of internal combustion engine |
| 06/11/2003 | CN2555412Y Combined positioned sealing type piston ring |
| 06/04/2003 | CN2554377Y High-efficient piston ring |
| 05/14/2003 | EP0975905B1 Internal combustion piston engine |
| 05/14/2003 | CN2550518Y 自动密封活塞环 Auto piston ring seal |
| 05/14/2003 | CN1108443C Piston ring structural body and method of mounting piston ring structural body |
| 05/01/2003 | US20030079709 Piston assembly having counterflow thwarting construction for use in an internal combustion engine |
| 04/24/2003 | US20030075144 Internal combustion engines |
| 04/24/2003 | US20030075143 Internal combustion engine with valve control |
| 04/23/2003 | EP1304393A1 Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing the same, and combination of piston ring and cylinder block |
| 04/16/2003 | CN2545375Y Complementary full-enclosed piston ring |
| 04/02/2003 | CN1407224A Self lubricated non-sealed piston ring for IC engine fastener driving tool |
| 04/02/2003 | CN1104575C Fitting method of sealing structure and piston ring structural body used in said sealing structure |
| 03/26/2003 | CN2541612Y Novel piston ring |
| 03/26/2003 | CN1405441A 活塞环 Piston |
| 03/19/2003 | EP1293302A2 A self lubricating, non-sealing piston ring for an internal combustion fastener driving tool |
| 03/13/2003 | WO2003021137A2 Cooled ring carrier for a piston |
| 03/12/2003 | CN1102994C Cylinder liner for internal combustion engine of diesel type |
| 03/06/2003 | WO2003019050A1 Two piece oil control ring with nitrided surface layers |
| 03/06/2003 | US20030042686 Self lubricating, non-sealing piston ring for an internal combustion fastener driving tool |
| 02/20/2003 | WO2003014600A1 Steel piston ring |
| 02/12/2003 | EP1283344A1 Piston ring |
| 02/12/2003 | CN2535570Y Conjugate double-ring piston ring |
| 02/05/2003 | CN1395032A Molybdenum-spraying treatment of surface of piston ring |
| 01/23/2003 | US20030015163 Piston ring device in internal combustion engine |
| 01/22/2003 | CN2532260Y Piston ring |
| 01/22/2003 | CN2532259Y Conic surface connection piston ring |
| 01/21/2003 | US6508473 Piston ring |
| 01/16/2003 | DE10111122C1 Kolbenring für eine Hubkolbenmaschine und Hubkolbenmaschine Piston ring for a reciprocating piston and reciprocating piston engine |
| 01/15/2003 | CN2531119Y Piston ring |
| 01/15/2003 | CN1391033A Improved cylinder |
| 01/08/2003 | CN2530051Y Internally expanded piston ring type piston assembly |
| 12/25/2002 | CN1387586A Method and device for producing machine components that are provided with at least one sliding surface |
| 12/19/2002 | US20020190476 Oil-scrapper piston ring and a method for producing an oil-scraper piston ring |
| 12/17/2002 | US6494461 Sliding member |
| 12/05/2002 | WO2002097310A1 Oil ring for an internal combustion engine |
| 12/04/2002 | EP1261819A1 Lubricated seals having micropores |
| 12/04/2002 | CN2523975Y Fully-sealed concave-convex poiston rings |
| 12/04/2002 | CN2523974Y Wear-resisting positon rings |
| 12/04/2002 | CN2523973Y Mono-directional sealed piston ring |
| 11/27/2002 | CN2522631Y Combined piston gaseous ring to improve engine sealing property |
| 11/13/2002 | CN2520420Y Full-enclosed piston ring |
| 11/12/2002 | US6478003 Piston for a four-stroke internal combustion engine |
| 11/07/2002 | WO2002088407A1 Nickel-aluminide based wear resistant material for piston rings |
| 11/07/2002 | WO2002088406A1 Intermetallic wear-resistant material for piston rings |
| 10/30/2002 | EP0979352B1 A two-stroke diesel engine piston |
| 10/29/2002 | US6470792 Combined compression and oil scraper piston ring |
| 10/23/2002 | CN2517880Y Cross butt buckling piston ring |
| 10/16/2002 | CN2516716Y Piston, piston ring assembly of internal-combustion engine |
| 10/16/2002 | CN1374448A Piston ring for piston of internal combustion engine |
| 10/16/2002 | CN1374447A Mechanical plunger and piston ring |
| 10/16/2002 | CN1374445A Completely closed piston and piston ring assembly |
| 10/09/2002 | CN2515431Y Piston ring for internal-combustion engine |
| 10/02/2002 | DE19780253C2 Gußeisen und Kolbenring Cast iron and piston ring |
| 10/02/2002 | CN2514130Y Sealed piston ring for IC engine |
| 10/01/2002 | US6457721 Piston ring locator |
| 09/25/2002 | EP1242726A1 Internal combustion engines |
| 09/25/2002 | EP1242721A1 Internal combustion engine with valve control |
| 09/12/2002 | WO2002070926A1 Reciprocating engine |
| 09/12/2002 | DE10207148A1 Kolbenring Piston ring |
| 09/11/2002 | CN2510636Y Environmental-protection energy-saving piston ring |
| 09/06/2002 | WO2002068706A1 Wear-resistant sliding member |
| 09/04/2002 | CN2509331Y 节能活塞环 Saving piston ring |
| 09/04/2002 | CN1367310A Piston ring with special opened gap |
| 08/29/2002 | US20020117808 Piston ring |
| 08/14/2002 | EP1230413A1 Method and device for producing machine components that are provided with at least one sliding surface |
| 08/14/2002 | EP0851984B1 Piston ring and piston assembly in an internal combustion engine |
| 08/01/2002 | US20020101039 Piston ring locator |
| 07/31/2002 | EP1227270A2 Pinless piston ring locator |
| 07/31/2002 | CN2503218Y Positioning lining whole sealed piston ring |
| 07/25/2002 | DE10046956C2 Thermisch aufgetragene Beschichtung für Kolbenringe aus mechanisch legierten Pulvern Thermal spray coating for piston rings from mechanically alloyed powders |
| 07/24/2002 | EP1224341A1 Process for electrolytic coating of a substrate |
| 07/24/2002 | CN2502030Y Joint overlapping piston ring |
| 07/24/2002 | CN2502029Y Piston ring |
| 07/17/2002 | CN2500821Y Piston assembly |
| 07/04/2002 | WO2002052179A1 Piston ring and method of producing the same |
| 07/03/2002 | CN2498356Y Key-ring style gapless piston ring |
| 06/27/2002 | WO2002024970A3 Thermally applied coating for piston rings, consisting of mechanically alloyed powders |
| 06/20/2002 | WO2002048422A1 Wear protection layer for piston rings, containing wolfram carbide and chromium carbide |
| 06/20/2002 | US20020074733 Compression piston ring for use in internal combustion engine |
| 06/20/2002 | DE10061750A1 Wolframhaltige Verschleißschutzschicht für Kolbenringe Tungsten-containing anti-wear layer for piston rings |
| 06/05/2002 | EP0670960B2 Piston-cylinder assembly of an internal combustion engine |
| 05/29/2002 | CN1085784C Engine piston |
| 05/23/2002 | WO2002040202A1 Method of producing by casting a piston with a cooled ring carrier |
| 05/23/2002 | DE10057366A1 Method for producing a piston with cooled ring carrier |