| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 11/29/2006 | CN2842103Y Piston ring |
| 11/29/2006 | CN2841985Y Trapezoidal rare-earth ceramic alloy piston ring |
| 11/23/2006 | DE102005023620A1 Method for manufacture of lamella-like sealing element, especially oil wiper ring in internal combustion engine, entails forming steel band into disc spring-form ring and axially elastically tensioning it flat before working it |
| 11/22/2006 | CN2839583Y Piston ring set |
| 11/16/2006 | US20060255546 Piston ring |
| 11/15/2006 | CN2837621Y Non-clearance, sealed, high-efficiency energy-saving piston ring |
| 11/09/2006 | WO2006118165A1 Reciprocating engine |
| 11/09/2006 | WO2006117856A1 Reciprocating engine |
| 11/09/2006 | US20060249913 Gapless piston ring for preventing blow-by |
| 11/09/2006 | DE102005019500A1 Schraubendruckfeder für Ölabstreifkolbenringe Helical compression spring for Ölabstreifkolbenringe |
| 11/09/2006 | CA2605227A1 Reciprocating engine |
| 11/08/2006 | EP1719901A1 Piston device for internal combustion engine |
| 11/08/2006 | EP1719827A1 Composite chromium plating film and sliding member having the same and its production method |
| 11/08/2006 | EP1377766A4 Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumption |
| 11/08/2006 | CN2835609Y 2.8L turbocharged and inter-cooled diesel engine |
| 11/08/2006 | CN2835598Y Diesel engine |
| 10/25/2006 | CN2830668Y Energy saving piston ring |
| 10/25/2006 | CN2830667Y Novel oil ring |
| 10/12/2006 | DE19854046B4 Einrichtung zur Feststellung von Normalwertabweichungen eines Motors Means for detecting deviations from normal value of a motor |
| 10/11/2006 | EP1710535A1 Method and device for detecting direction of member having outer periphery formed in vertically asymmetrical shape |
| 10/11/2006 | CN2826092Y Non-clearance piston ring |
| 10/11/2006 | CN1844650A Low-friction energy-saving piston ring two-way rabbeted opening |
| 10/10/2006 | US7117594 Oil-scraper piston ring and a method for producing an oil-scraper piston ring |
| 10/05/2006 | DE10234528B4 Kolbenringkombination Combination of piston rings |
| 09/27/2006 | CN1839273A Spacer expander |
| 09/20/2006 | CN2818819Y Piston ring of IC engine |
| 09/08/2006 | WO2006092087A1 A locating combined gas ring an piston assembly using it |
| 09/06/2006 | CN2814032Y Non-opening piston ring |
| 09/06/2006 | CN1828034A Positioning combined compression ring and piston assembly using same |
| 08/30/2006 | CN1824939A Method for processing multilayer Cr based network embedded superhard wear-proof particle plating layer piston ring |
| 08/30/2006 | CN1272452C Wear-resistant composition |
| 08/23/2006 | CN1821564A Low friction triangle section port energy saving type piston ring |
| 08/17/2006 | DE102005006670A1 Antiadhäsive Beschichtung von Bauteilen zur Verhinderung von Ölkohleanbackungen Anti-adhesive coating of components to prevent Ölkohleanbackungen |
| 08/16/2006 | CN2806798Y 汽车油环 Automotive oil ring |
| 08/16/2006 | CN1818365A Piston with pressure-reducing piston ring |
| 08/09/2006 | EP1304393B1 Piston ring excellent in resistance to scuffing, cracking and fatigue and method for producing the same, and combination of piston ring and cylinder block |
| 08/09/2006 | CN2804502Y Two-way consealed monoblock piston ring |
| 08/03/2006 | US20060169135 Spacer expander |
| 07/27/2006 | DE102004053454B4 Piston ring with rear cutting |
| 07/26/2006 | CN2799872Y 钢质油环 Steel oil ring |
| 07/26/2006 | CN1266292C Nickel-aluminide based wear-resistant material for piston rings |
| 07/19/2006 | CN2797659Y Wedge overlap mouth type piston ring |
| 07/19/2006 | CN2797658Y Piston ring with joint having axial and radial sealing surface |
| 07/18/2006 | US7077402 Combined oil ring |
| 07/13/2006 | WO2006072211A1 A rolling piston for replacing the sliding friction between the piston and the cylinder with the rolling friction |
| 07/13/2006 | US20060151959 Sealing ring and sealing ring arrangement |
| 07/13/2006 | DE19810309B4 Druckring, insbesondere Kolbenring für Aluminiumzylinder sowie Verfahren zu dessen Herstellung Thrust ring, in particular piston rings for aluminum cylinder and to processes for the preparation thereof |
| 07/05/2006 | CN2793352Y Piston and gaseous piston ring assembly |
| 07/04/2006 | US7069881 Cooled ring carrier for a piston |
| 06/28/2006 | CN1793704A Screw type piston ring |
| 06/22/2006 | US20060131520 Device and method for inspecting piston ring |
| 06/21/2006 | CN2789443Y Single-oil wiper side screw stay reed oil ring |
| 06/08/2006 | US20060118019 Ship with liquid tank |
| 06/08/2006 | DE102004032342B4 Production of a coating on the outer peripheral surface of a base body of a piston ring used in combustion engines comprises applying a lower layer to the peripheral surface by thermal spraying and applying an upper wear protection layer |
| 06/01/2006 | US20060113730 Combination oil ring |
| 06/01/2006 | DE102004057560A1 Piston ring, useful for a combustion engine, comprises a bearing surface, which is provided with a plastic coating (made of polyamidimidimide and/or polyetheretherketone with stored particles) |
| 05/31/2006 | EP1333949B1 Method of producing by casting a piston with a cooled ring carrier |
| 05/31/2006 | CN2784598Y Piston ring set |
| 05/31/2006 | CN2784597Y Superposed open type piston ring and piston ring assembly |
| 05/30/2006 | US7052019 Piston ring and method of manufacturing the same |
| 05/30/2006 | US7052018 Piston ring having wear resistant composition |
| 05/26/2006 | WO2006054769A1 Piston of internal combustion engine and combination of piston with piston ring of internal combustion engine |
| 05/26/2006 | WO2006053489A1 Oil sealing ring |
| 05/24/2006 | CN1776263A Forced sealing oil ring |
| 05/18/2006 | US20060102131 Piston apparatus with oil scraper ring |
| 05/18/2006 | DE102004053454A1 Piston ring with rear cutting |
| 05/17/2006 | EP1657477A1 Spacer expander |
| 05/17/2006 | CN1256506C Self lubricated non-sealed piston ring for IC engine fastener driving tool |
| 05/16/2006 | US7044473 Piston and piston ring assembly |
| 05/10/2006 | EP1476587B1 Piston ring comprising a pvd coating |
| 05/10/2006 | CN1771387A Combination oil ring |
| 05/10/2006 | CN1769659A Piston ring |
| 05/03/2006 | CN2777289Y Piston ring |
| 05/02/2006 | US7036823 Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumption |
| 04/26/2006 | CN2775405Y High air tight piston ring |
| 04/26/2006 | CN2775323Y Internal combustion engine piston compressing ring |
| 04/26/2006 | CN1764776A Oil ring, manufacturing method thereof, and piston structure using the oil ring |
| 04/26/2006 | CN1764745A Composite chromium plating film and sliding member having the same and method for manufacture thereof |
| 04/26/2006 | CN1763361A Sealing ring with amorphous/amorphous nano structure coating for internal combustion engine piston |
| 04/20/2006 | US20060081126 Oil ring, manufacturing method thereof, and piston structure using the oil ring |
| 04/19/2006 | CN1760527A Running roll engine with leakproof piston ring |
| 04/12/2006 | CN2771493Y Piston ring overlap piston |
| 04/12/2006 | CN1757897A Combined piston ring |
| 04/11/2006 | US7024982 Combination of piston and piston ring |
| 04/11/2006 | US7024866 Axial loaded seal system with a static L-seal |
| 03/22/2006 | CN2766047Y Combined piston ring |
| 03/08/2006 | CN2763548Y Seal piston ring of arc-face and ring edge for internal combustion engine |
| 03/08/2006 | CN1745239A Reciprocating engine |
| 03/08/2006 | CN1244751C Internal combustion engine with valve control |
| 03/02/2006 | DE102004040055A1 Gusseisenwerkstoff für Kolbenringe Cast iron material for piston rings |
| 02/23/2006 | US20060040124 Composite chromium plating film and sliding member having the same and method for manufacture thereof |
| 02/21/2006 | US7001670 Wear protection layer for piston rings, containing wolfram carbide and chromium carbide |
| 01/19/2006 | WO2006005288A1 Method for producing a coat on a piston ring and piston ring |
| 01/18/2006 | EP1617066A1 Oil ring, method of producing the same, and piston structure using the oil ring |
| 01/18/2006 | CN2752462Y Air leaking prevention piston ring unit |
| 01/18/2006 | CN1721742A High gas-tight piston ring |
| 01/12/2006 | WO2006004221A1 Piston ring, piston, cylinder and piston pin having amorphous and hard carbon film |
| 01/11/2006 | CN1719017A Manufacutring technology of friction pair four composite unit without grinding |
| 01/05/2006 | DE102005027233A1 Abgas-Steuervorrichtung und Abgas-Steuerverfahren für einen Verbrennungsmotor Exhaust gas control apparatus and exhaust gas control method for an internal combustion engine |
| 01/04/2006 | EP1261819A4 Lubricated seals having micropores |