| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 01/04/2006 | CN1717557A Combination oil ring |
| 12/28/2005 | CN2748658Y Piston ring with double rings |
| 12/22/2005 | WO2005121608A1 A piston, a ring and a piston assembly for a two cycle engine |
| 12/22/2005 | DE102004032403B3 Verfahren zur Erzeugung einer Beschichtung auf einem Kolbenring sowie Kolbenring A method for producing a coating on a piston ring and piston ring |
| 12/15/2005 | US20050274106 Exhaust gas control apparatus and exhaust gas control method for internal combustion engine |
| 12/07/2005 | CN2744846Y Parallel connection type combined seal ring with reed |
| 11/30/2005 | EP1600523A1 Wear resistant coating for piston rings |
| 11/24/2005 | WO2005111403A2 Wedge seal |
| 11/24/2005 | US20050260436 Wear resistant coating for piston rings |
| 11/16/2005 | CN1696486A Piston ring mechanism with zero leakage in axial direction |
| 11/03/2005 | US20050242519 Wedge seal |
| 10/13/2005 | US20050224038 Reciprocating engine |
| 10/12/2005 | CN2733111Y Piston ring |
| 10/12/2005 | CN2733013Y Multicomponent multilayer nano film piston ring |
| 10/06/2005 | US20050218603 Piston ring comprising a pvd coating |
| 10/05/2005 | CN2731121Y Piston ring for internal combustion engine and air compressor |
| 09/28/2005 | CN2729341Y Combined ring leakless piston assembly |
| 09/28/2005 | CN2729340Y 密封式活塞环 Sealed Piston |
| 09/21/2005 | CN2727422Y Motorcycle engine cylinder |
| 09/14/2005 | CN2725553Y Building up type eccentric location sealing piston ring |
| 09/07/2005 | EP1325252A4 Two piece oil control ring with nitrided surface layers |
| 09/07/2005 | CN2723700Y Combined piston ring |
| 09/07/2005 | CN2723699Y Combined air ring with seal interlock device |
| 09/01/2005 | US20050188942 Sliding structure for automotive engine |
| 08/31/2005 | CN2721974Y 活塞环 Piston |
| 08/31/2005 | CN2721888Y Piston and sealing ring |
| 08/31/2005 | CN1661267A Wear resistant composition |
| 08/25/2005 | WO2005078268A1 Piston device for internal combustion engine |
| 08/25/2005 | US20050184466 Steel piston ring |
| 08/24/2005 | CN2720136Y Rotary parallel-connected lining-combined sealing ring |
| 08/17/2005 | EP1366314B1 Reciprocating engine |
| 08/17/2005 | EP1184558B1 Piston and piston ring assembly |
| 08/11/2005 | WO2005073437A1 Composite chromium plating film, and sliding member having the film and method for manufacture thereof |
| 08/04/2005 | WO2005071355A1 Method and device for detecting direction of member having outer periphery formed in vertically asymmetrical shape |
| 08/04/2005 | DE10006426B4 Gleitelement Slider |
| 08/03/2005 | CN1648432A Double layer O-shaped interlocking combined gas ring |
| 07/13/2005 | CN2709666Y Whole sealed piston ring |
| 07/13/2005 | CN2709665Y Piston ring |
| 07/13/2005 | CN1210427C Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing same, and use |
| 07/12/2005 | CA2281566C An oil sealing ring |
| 07/06/2005 | CN1209483C Wear-resistant sliding member |
| 06/29/2005 | CN1632297A Novel process for making piston ring |
| 06/22/2005 | CN1630791A Oil ring of internal combustion engine |
| 06/16/2005 | US20050127612 Piston ring having wear resistant composition |
| 06/15/2005 | CN1628212A 往复发动机 Reciprocating engine |
| 06/08/2005 | CN2703885Y Zero-leakage piston ring mechanism |
| 05/25/2005 | EP1533509A1 Reciprocating engine |
| 05/25/2005 | CN2702067Y Piston ring set |
| 05/25/2005 | CN1620520A Heat spraying of piston ring |
| 05/18/2005 | CN2700586Y Piston ring mechanism without axial leakage |
| 05/18/2005 | CN2700571Y Motorcycle engine with wearing parts hardened by plasma beam |
| 05/12/2005 | US20050100701 Hard carbon coating on substrate; multilayer; lubrication |
| 05/04/2005 | CN1611760A Forced sealing oil ring |
| 05/03/2005 | US6887585 Thermally applied coating of mechanically alloyed powders for piston rings |
| 05/03/2005 | US6886521 Sliding structure for automotive engine |
| 04/27/2005 | CN2695658Y Assembling piston gaseous ring with positioning sealing |
| 04/27/2005 | CN2695657Y Piston gaseous ring with concave-convex cut |
| 04/27/2005 | CN2695656Y Special sealing gaseous ring |
| 04/27/2005 | CN1609435A Screw expanding spring double-leaf combined piston ring for internal combustion engine |
| 04/20/2005 | EP1524459A2 Piston ring comprising a wear-resistant composition |
| 04/20/2005 | CN2693973Y Piston combination |
| 04/13/2005 | CN2692363Y Piston ring |
| 04/13/2005 | CN2692362Y Oil ring for internal combustion engine piston ring |
| 04/07/2005 | US20050073107 Thermal spraying of a piston ring |
| 04/06/2005 | CN2690676Y Air ring for compressor piston |
| 03/30/2005 | CN2688908Y Piston of IC engine |
| 03/23/2005 | CN2687358Y Multiple overlapped fully-sealed piston ring |
| 03/03/2005 | WO2005019706A1 Spacer expander |
| 03/02/2005 | CN2682220Y 活塞环 Piston |
| 03/01/2005 | US6860485 Piston ring |
| 02/23/2005 | CN2680882Y Piston ring of internal combustion engine |
| 02/23/2005 | CN2680881Y Magnetic self-sealing piston ring |
| 02/23/2005 | CN1584353A Sliding member and production process thereof |
| 02/09/2005 | EP1505322A1 Sliding member and production process thereof |
| 02/09/2005 | CN2677634Y Full closed piston ring |
| 02/02/2005 | CN2675884Y Piston ring and piston combined positioning device |
| 01/26/2005 | CN2674206Y Non-broken piston ring |
| 01/26/2005 | CN1570368A Method for extending operation life of engine cylinder |
| 01/19/2005 | EP0800627B1 Piston assembly with piston ring support and sealing member |
| 01/19/2005 | CN2672305Y Combined seal piston ring |
| 01/19/2005 | CN1185371C Method for electroplating substrate using ceramic chromium and ceramic chromium layer electroplated on substrate |
| 01/19/2005 | CN1185361C Method for producing machine components with at least one sliding surface |
| 01/05/2005 | CN2668876Y Openless environmental-protection piston ring for internal combustion engine |
| 01/05/2005 | CN2668875Y Piston ring with automatic closed regulating gap |
| 01/04/2005 | US6838196 A composite of an intermetallic matrix of nickel aluminide (NiAl or Ni3Al) which supports a ceramic and keeps the hard phase in place; wear-resistance; high-temperature, heat resistance; protective coatings; marine diesel engines |
| 01/04/2005 | US6837298 Method of producing by casting a piston with a cooled ring carrier |
| 12/29/2004 | WO2004113706A1 Device and method for inspecting piston ring |
| 12/29/2004 | CN2667244Y Piston ring coated with wear resistant nickel base alloy |
| 12/29/2004 | CN2667183Y Anti-expansion piston |
| 12/28/2004 | US6834861 Two piece oil control ring with nitrided surface layers |
| 12/08/2004 | CN2661943Y Scabbled and honed piston ring |
| 12/08/2004 | CN2661942Y U type piston ring of motorcycle engine |
| 12/08/2004 | CN1553049A Assembled gaseous ring with interlocking apparatus and piston |
| 12/01/2004 | CN2660145Y Cylinder piston ring |
| 11/30/2004 | CA2120998C Slide member made of an aluminium alloy |
| 11/25/2004 | US20040232623 Oil ring for an internal combustion engine |
| 11/24/2004 | EP1478791A1 Thermal spraying of a piston ring |
| 11/24/2004 | CN1548709A Reinforced seal oil ring |
| 11/17/2004 | EP1476587A1 Piston ring comprising a pvd coating |
| 11/10/2004 | CN2654887Y Pairing combined engine piston oil ring |