| Patents for F02F 5 - Piston rings, e.g. associated with piston crown (2,184) |
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| 02/17/2010 | CN101649791A Piston ring stet of single-cylinder air-cooled diesel engine |
| 02/17/2010 | CN101649790A Processing method of steel piston gas ring |
| 02/10/2010 | CN101644206A Internal-combustion engine piston ring |
| 01/21/2010 | DE102008032937A1 Oil scraping piston ring comprises base body with bearing surface formed by bearing surface bar, and inner peripheral surface is provided with groove |
| 01/21/2010 | DE102008028052A1 Verfahren zur Stabilisierung eines Kolbenrings und Mittel zur Durchführung dieses Verfahrens A process for the stabilization of a piston ring, and means for carrying out this method |
| 01/13/2010 | CN201381907Y Piston ring with composite multi-element thin-film layer |
| 01/07/2010 | DE102008031864A1 Insert for piston of internal combustion engine i.e. diesel engine, has supporting and cavity base parts that are arranged radially at distance from each other and connected with one another by covers, such that cooling channel is formed |
| 01/07/2010 | DE102008031862A1 Insert for piston of combustion engine, particularly diesel engines, has circulating fire land, circulating ring portion and circulating cooling duct, where piston head is provided with piston base having combustion recess |
| 01/06/2010 | CN201377362Y Assembling structure of piston and piston rings |
| 01/06/2010 | CN101619685A Application of single-groove double-piece distortion combination type piston ring to high-power military diesel engine |
| 12/30/2009 | WO2009157328A1 Oil ring and piston for internal combustion engine |
| 12/23/2009 | CN201367947Y Piston ring |
| 12/23/2009 | CN101608575A Optical engine |
| 12/09/2009 | CN201358845Y Reinforced overlapping and sealing piston ring |
| 12/03/2009 | WO2009104031A3 Split sealing ring for pistons |
| 11/26/2009 | DE10149127B4 Kompressionskolbenring für die Verwendung in einem Verbrennungsmotor und Dieselmotor Compression piston ring for use in an internal combustion engine and diesel engine |
| 11/25/2009 | CN101586511A Piston ring of diesel engine |
| 11/19/2009 | WO2009138838A1 A single-ring piston ring and sealing method thereof |
| 11/18/2009 | EP2119807A1 Chromium nitride coating film by ion plating, process for producing the same, and piston ring for internal combustion engine |
| 11/18/2009 | CN201347813Y Strengthened type oil ring structure |
| 11/18/2009 | CN101581259A Method for establishing piston ring mechanism for sealing single-ring piston engine |
| 11/18/2009 | CN100561021C Combination oil ring |
| 11/12/2009 | DE10252795B4 Kombinierter Stahlölabstreifring Combined Stahlölabstreifring |
| 11/11/2009 | CN201344071Y Elastic force balanced type wear-resistant piston ring |
| 11/11/2009 | CN101576019A Engine piston ring |
| 11/11/2009 | CN101576018A Sealing device of engine cylinder |
| 11/10/2009 | CA2395908C Internal combustion engine with valve control |
| 10/29/2009 | DE112007002854T5 Kolbenring Piston ring |
| 10/22/2009 | DE102008016864B3 Kolbenring Piston ring |
| 10/21/2009 | CN101560914A Engine with air-suspending sealing ring |
| 10/15/2009 | DE102008017583A1 Piston ring for internal combustion engine e.g. petrol engine, has wear-protection layer consisting of material that possesses reduced specific elasticity modulus, where elasticity modulus is calculated using specific equation |
| 10/14/2009 | CN201326469Y Piston packing ring of engine |
| 10/14/2009 | CN100549471C Piston ring and method for producing the same |
| 10/07/2009 | CN201321913Y Low oil consumption piston ring oil ring |
| 10/01/2009 | WO2009119388A1 Piston ring material for internal combustion engine |
| 10/01/2009 | DE102008014859A1 Piston for internal combustion engine, has pressure recess extending along upper groove surface from mantle surface, in such way that pressure recess ends before groove base in radial direction of piston head towards piston axis |
| 09/17/2009 | DE202009009206U1 Kolbenring Piston ring |
| 09/16/2009 | CN201310415Y Single-ring piston engine |
| 09/16/2009 | CN101532447A Pressure keeping piston |
| 09/10/2009 | US20090226304 Adjusting shaft arrangement of a turbocharger |
| 09/09/2009 | CN101526046A Piston ring |
| 09/03/2009 | DE102008004029B3 Method for manufacturing piston ring, involves cutting laminated composite material to produce inner peripheral surface, outer peripheral surface, upper flank surface and lower flank surface |
| 09/02/2009 | CN201301757Y Piston packing ring |
| 09/02/2009 | CN100535425C Oil ring for piston structure and manufacturing method thereof |
| 08/27/2009 | WO2009104031A2 Split sealing ring for pistons |
| 08/19/2009 | CN100529374C Piston ring, piston, cylinder and piston pin having amorphous and hard carbon film |
| 08/12/2009 | EP1242726A4 Internal combustion engines |
| 08/12/2009 | EP1242721A4 Internal combustion engine with valve control |
| 08/12/2009 | CN201288616Y Steel belt combined oil ring blade ring with electric chromium layer and ceramic micro-particles combined on the outer ring |
| 08/12/2009 | CN100526494C Material for manufacturing aluminum piston abrasion-proof inserted ring |
| 08/05/2009 | CN101498256A Chromium based diamond composite chrome plating coating piston ring and method of processing the same |
| 08/05/2009 | CN101498255A Side rapid chrome plating piston ring and processing method |
| 07/16/2009 | US20090179386 Gastight piston ring arrangement |
| 07/15/2009 | CN101482070A Piston ring group of internal combustion engine |
| 07/08/2009 | CN201269146Y 活塞环 Piston Ring |
| 07/08/2009 | CN100510368C Wire material for coil expander and coil expander |
| 07/08/2009 | CN100510367C Integrated oil ring |
| 06/25/2009 | WO2009033115A3 High efficiency piston ring |
| 06/18/2009 | WO2009074069A1 A compression ignition engine with a combination of features to reduce emissions |
| 06/18/2009 | DE102007059205A1 Oil control ring has slots, which are provided in area of outer peripheral surface of base body based on respective front edge of impact opening for holding or guiding end areas of sealing element |
| 06/17/2009 | CN100501199C Side rail for reduction of oil consumption and combined oil control ring incorporated with the side rails |
| 06/10/2009 | DE102007059206B3 Oil scraper ring for internal combustion engine, has closed sealing ring cooperating with nose-shaped attachment piece at side of opening, where points of attachment piece penetrate and are engaged into opening |
| 06/04/2009 | WO2009069762A1 Steel products for piston rings and piston rings |
| 06/04/2009 | WO2009069703A1 Combination structure of piston ring and cylinder liner of internal combustion engine |
| 06/04/2009 | DE102007057958A1 Piston ring e.g. oil scarper piston ring, producing method for combustion engine, involves conically forming lateral surfaces of lobe shaped sections during punching of metal steel tape in cross section |
| 06/04/2009 | DE102007057956A1 Piston ring i.e. oil scraper piston ring, manufacturing method for internal combustion engine, involves forming partially bent upward sections by punching flat metal spring band, where lateral surface of each section is formed in bend form |
| 06/04/2009 | DE102007057840A1 Funktionsoptimierte Gestaltung des Kolben-Ringfeldbereiches bei Stahlkolben Function-optimized design of the piston ring zone area for steel pistons |
| 06/04/2009 | DE10134293B4 Gekühlter Ringträger für einen Kolben Cooled ring carrier for a piston |
| 05/27/2009 | CN201246228Y Seal piston gas ring |
| 05/27/2009 | CN201246227Y Seal type piston ring |
| 05/27/2009 | CN100491898C Method and device for detecting direction of member having outer periphery formed in vertically asymmetrical shape |
| 05/20/2009 | CN201241764Y Three-orifice type environment protection piston ring |
| 05/20/2009 | CN201241763Y Full seal automatic compensation type energy-saving discharge-reducing piston ring |
| 05/20/2009 | CN101435381A 活塞环 Piston Ring |
| 05/14/2009 | DE102007053873A1 Split piston ring for performing expansion or compression of piston of e.g. stirling engine, has segments, where pre-loading of ring is adjusted over outer diameter such that ring has exactly same diameter as cylinder |
| 05/13/2009 | CN201236750Y Novel piston ring for internal-combustion engine |
| 05/13/2009 | CN201236744Y Two-stroke horizontal contraposition dual-spindle engine |
| 05/13/2009 | CN101430004A PVD chromium based ceramic composite coating piston ring and method for producing the same |
| 05/13/2009 | CN101429904A Piston ring |
| 05/13/2009 | CN101429903A Double-piece combination automatic positioning piston ring |
| 05/06/2009 | CN201232594Y Chromium layer and ceramic particles composite electroplated piston ring for excircle after nitridation |
| 04/22/2009 | CN201225203Y Surface enhanced antifriction piston ring |
| 04/21/2009 | CA2491821C Optimized low emission two-stroke internal combustion diesel engine |
| 04/16/2009 | DE102006023396B4 Verschleißschutzbeschichtung sowie Verwendung und Verfahren zur Herstellung einer solchen Wear-resistant coating, as well as use and methods for producing such |
| 04/15/2009 | EP1596106B1 Combination oil control ring |
| 04/15/2009 | CN201221419Y Piston ring for internal combustion engine piston |
| 04/15/2009 | CN101410610A 内燃机 Internal combustion engine |
| 04/14/2009 | US7516963 Sealing arrangement with supporting ring, and supporting ring |
| 04/09/2009 | WO2009043227A1 A sealing oil ring |
| 04/09/2009 | DE4327621B4 Kolbenringnutgestaltung für Kolben von Verbrennungsmotoren Kolbenringnutgestaltung for pistons for combustion engines |
| 04/09/2009 | DE102008049186A1 Piston engine i.e. internal combustion engine such as gasoline engine, for motor vehicle, has magnet arranged such that magnet cooperates with piston ring, so that piston ring is held in contact with groove surfaces |
| 04/09/2009 | DE102006024098B4 Kolben mit einer Ringträger-Kühlkanal-Kombination Piston ring carrier with a cooling channel combination |
| 04/08/2009 | CN101403437A Sealed oil ring |
| 04/08/2009 | CN101403348A Piston ring of reciprocating engine |
| 04/08/2009 | CN100476187C Piston ring for automatically closing and adjusting clearance |
| 04/02/2009 | DE102007045163A1 Latent heat storage for a combustion engine of motor vehicle, comprises a storage medium, in which heat is stored under utilization of enthalpy of reversible thermodynamic state and is extracted from the stored heat |
| 03/31/2009 | US7510196 Oil ring for internal combustion engine |
| 03/31/2009 | US7510195 High temperature and high pressure compressor piston ring |
| 03/25/2009 | CN101395291A Piston ring material for internal combustion engine |
| 03/19/2009 | US20090071433 Reciprocating engine |