| Patents for F16J 9 - Piston-rings, seats therefor; Ring sealings of similar construction in general (4,592) |
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| 04/23/1998 | WO1998016763A1 Gap-sealed piston ring |
| 04/22/1998 | CN1179515A Sealed piston ring |
| 04/15/1998 | CN2278798Y Sealing ring |
| 04/14/1998 | US5737999 Blowby pressure control above an oil control ring in a reciprocating internal combustion engine |
| 04/14/1998 | US5737838 Method of making a piston unit for an internal combustion engine |
| 04/01/1998 | EP0832384A1 Sealing ring |
| 04/01/1998 | EP0832383A1 Sealing arrangement |
| 04/01/1998 | EP0832382A1 Sealing ring |
| 04/01/1998 | EP0832381A1 Sealing washer |
| 03/24/1998 | US5730263 Vibration damper |
| 03/18/1998 | CN1176315A Iron casting alloy for producing piston ring of internal-combustion engine |
| 03/12/1998 | DE19734480A1 Sliding component for contact with light alloy, especially oil seal |
| 03/11/1998 | CN1175605A Sliding member for use with lightweight metal |
| 02/26/1998 | WO1998008009A2 Packing seal |
| 02/17/1998 | US5718437 Hardness; wear resistance |
| 02/11/1998 | CN1037369C Unit ring used for piston ring and its piston ring |
| 02/05/1998 | WO1998004853A1 Method of manufacturing a sealing element, and sealing element manufactured by that method |
| 02/05/1998 | DE19630745A1 Dichtpaket Sealing package |
| 02/03/1998 | US5713578 Hydraulic sealing device |
| 02/03/1998 | US5713324 Piston ring coating |
| 02/03/1998 | US5713129 Method of manufacturing coated piston ring |
| 01/29/1998 | DE19654893A1 Cast iron alloy used e.g.. in the manufacture of actuator sleeves |
| 01/28/1998 | EP0821073A1 Cast iron alloy for the production of piston rings for combustion engines |
| 01/28/1998 | EP0820831A1 Method for forming wear resistant facings on ring groove areas of pistons of aluminium materials; piston for combustion engines |
| 01/28/1998 | CN1037208C Piston top ring for IC engine |
| 01/27/1998 | US5711206 Piston and cylinder assembly for minimizing water blow-by in an air compressor |
| 01/08/1998 | WO1998000660A1 Seals for hydraulic assemblies |
| 01/02/1998 | DE19646128C1 Coil compression-springs for oil-control rings for piston |
| 12/18/1997 | WO1997047870A1 Cylinder-piston assembly |
| 12/11/1997 | WO1997046799A1 Engine block for a multi-cylinder internal combustion engine |
| 12/10/1997 | CN1167218A Improved tangram type locked compressing-ring |
| 12/09/1997 | US5695199 Piston sealing assembly |
| 11/27/1997 | DE19629331C1 Brass ring for piston in cylinder of internal combustion engine and compressor |
| 11/26/1997 | EP0809050A1 Piston for an internal combustion engine and method of making a piston |
| 11/26/1997 | CN2268816Y Assembled piston ring |
| 11/19/1997 | CN1165260A O-ring of multi-lobular cross section |
| 11/05/1997 | CN2266667Y 活塞环 Piston Ring |
| 11/05/1997 | CN2266666Y Rubber sealing ring |
| 10/23/1997 | WO1997039262A1 Cylindrical spiral piston rings, in particular for pistons of the composite type, for endothermic motors, compressors and pumps |
| 10/23/1997 | WO1997039261A1 Composite piston for the use on endothermic motors, compressors and pumps |
| 10/22/1997 | EP0802333A1 Improved puzzle-lock compression ring |
| 10/22/1997 | EP0801715A1 Sealing ring |
| 10/15/1997 | EP0800627A1 Piston assembly with piston ring support and sealing member |
| 10/14/1997 | US5676380 Venting piston ring |
| 10/08/1997 | EP0799902A1 Piston ring material excellent in workability |
| 10/07/1997 | US5673923 Split seal ring made of synthetic resin having crossed diverging ends |
| 10/02/1997 | DE19624346A1 High pressure seal between piston and chamber |
| 10/01/1997 | EP0797743A1 Piston ring seal |
| 10/01/1997 | CN1161077A Abrasion resistant ring for a piston for an engine and method and device for producing the same |
| 09/30/1997 | US5671710 Pistons for internal combustion engines and method of manufacturing same |
| 09/17/1997 | CN1159511A Wearing-resistant parts, especially the piston ring of internal combustion engine |
| 09/10/1997 | CN2262137Y Pressure compensation sealing device for hydraulic cylinder |
| 09/09/1997 | US5664536 Self-locating piston ring for a two-stroke engine |
| 09/04/1997 | WO1997032049A1 Cast iron and piston ring |
| 08/27/1997 | EP0791738A1 Abrasion resistant ring for a piston for an engine and method and device for producing the same |
| 08/26/1997 | US5660399 Piston rings particularly suited for use with ceramic matrix composite pistons and cylinders |
| 08/26/1997 | US5660398 Hydraulic sealing device |
| 08/21/1997 | WO1997030277A1 A piston assembly with self-adjusting and self-lubricating device |
| 08/20/1997 | CN2260173Y Piston element with automatic lubricating and clearance adjusting device |
| 08/20/1997 | CN1157382A Quick operating and/or sealing range high temp. turbomachine contact sealing device |
| 08/12/1997 | US5655955 Method and tool for improving the structure of the inner faces of working chambers of machines and motors |
| 08/05/1997 | US5653021 Forming groove on outer face of aluminum alloy piston, forming thickening layer by irradiating while supplying copper alloy powder, melting powder |
| 07/31/1997 | DE19602716A1 Piston ring seal |
| 07/29/1997 | US5651553 Antirotation structure for combined oil ring |
| 07/24/1997 | DE19700835A1 Self-lubricating composite layer production |
| 07/23/1997 | CN1155044A Sealing device for piston rod |
| 06/26/1997 | WO1997022792A1 An oil sealing ring |
| 06/26/1997 | DE19653598A1 Metal powder piston ring |
| 06/25/1997 | CN2256963Y Split-type piston-ring |
| 06/25/1997 | CN1035279C Anti-wedging pressure seal ring apparatus |
| 06/11/1997 | CN2256055Y 密封垫 Seals |
| 06/05/1997 | DE19649363A1 Internal combustion engine piston unit manufacture process |
| 05/29/1997 | WO1997019280A1 Piston ring |
| 05/29/1997 | CA2237787A1 Piston ring |
| 05/28/1997 | EP0775857A1 Contact seal for fluid turbines |
| 05/28/1997 | EP0775542A1 Ring carrier for pistons and method for casting pistons using the same |
| 05/28/1997 | EP0742875B1 A piston top ring for an internal combustion engine |
| 05/13/1997 | US5628519 For use in sealing hydraulic oil in an automatic transmission |
| 05/07/1997 | DE19541016A1 Oil wiper for piston of internal combustion engine, compressor etc. |
| 04/30/1997 | CN2253412Y Piston and combined air ring of internal combustion engine |
| 04/23/1997 | CN2252913Y Sealing ring with wave-shape inner wall |
| 04/17/1997 | WO1997013991A1 Piston assembly with piston ring support and sealing member |
| 04/17/1997 | CA2207433A1 Piston assembly with piston ring support and sealing member |
| 04/16/1997 | CN1147592A Piston ring for combustion engines |
| 04/15/1997 | US5619795 For a reciprocal internal combustion engine |
| 04/09/1997 | CN1147289A Machine having cylinder and piston, and ring seal therefor |
| 04/08/1997 | US5618590 Causing arc discharge in process gas comprising nitrogen or carbon using as cathode targets cobalt, nickel, silicon, titanium, vanadium, chromium, iron, zirconium, niobium, tungsten to form nitride or carbide coatings |
| 04/08/1997 | US5618048 Piston ring seal having angled ends |
| 04/08/1997 | US5618046 Piston ring assembly |
| 04/03/1997 | WO1997012139A1 The piston compression ring assemblies being self-lubricated and self-adjusted |
| 03/27/1997 | WO1997011295A1 A piston ring for a piston in an internal combustion engine |
| 03/27/1997 | WO1997011294A1 An improved piston ring |
| 03/26/1997 | EP0764801A1 Piston ring for combustion engine |
| 03/25/1997 | US5614022 Thermal spraying lining process for piston rings and nozzle for spraying |
| 03/20/1997 | WO1997010424A1 A combination piston compression ring |
| 03/18/1997 | US5611260 Piston ring mount structure |
| 02/27/1997 | WO1997007330A1 Abrasion resistant ring for a piston for an engine and method and device for producing the same |
| 02/25/1997 | US5605741 Multilayer |
| 02/18/1997 | US5603512 Side and gap sealed oil ring |
| 02/11/1997 | US5601293 Sliding member with hard ternery film |