| Patents for F16J 9 - Piston-rings, seats therefor; Ring sealings of similar construction in general (4,592) |
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| 05/18/1999 | US5903974 Method of and apparatus for producing hollow ring groove insert for engine piston |
| 05/11/1999 | US5901963 Gas nitrided taper faced keystone piston ring incorporating a sealing land and orientation groove |
| 05/11/1999 | US5901772 Method for casting pistons |
| 05/06/1999 | EP0912846A1 Seals for hydraulic assemblies |
| 04/29/1999 | DE19808484C1 Combustion engine oil scraper ring |
| 04/28/1999 | EP0910760A1 Internal combustion piston engine |
| 04/07/1999 | EP0906527A1 Piston rings and/or a piston in an internal combustion engine of the diesel type and a method of running-in of a diesel engine |
| 03/31/1999 | EP0905420A2 Piston ring |
| 03/31/1999 | EP0905419A2 Piston ring |
| 03/31/1999 | EP0905362A1 Cylinder-piston assembly |
| 03/25/1999 | DE19741598A1 Sealing ring between rotary and fixed component |
| 03/24/1999 | CN1211682A Forceful sealing oil ring |
| 03/16/1999 | US5882012 Oil seal ring |
| 02/10/1999 | EP0896174A2 Piston ring arrangement for shock absorber |
| 02/03/1999 | CN1206800A T型压力容器密封圈 T-type pressure vessel seals |
| 02/02/1999 | US5865443 Seal ring |
| 02/02/1999 | US5865091 For reciprocation within a cylinder bore of a double-acting hot gas engine |
| 01/21/1999 | WO1999002898A1 Piston assembly for stirling engine |
| 01/20/1999 | CN1205393A Combined long service, high air tight piston ring and I. C. engine made therefrom |
| 01/13/1999 | CN1204724A 活塞环 Piston Ring |
| 01/05/1999 | CA2132261C Vibration desensitizing piston wear ring for railroad car control valve |
| 12/23/1998 | CN2301541Y Compound ring piston |
| 12/22/1998 | CA2004502C Piston ring having a function which is for facilitating supply of lubricating oil into an annular groove of a piston |
| 12/16/1998 | EP0884400A1 Hard coating material, sliding member covered with hard coating material, and manufacturing method thereof |
| 12/08/1998 | CA2082205C Piston compressor for the oilfree compression of gases |
| 12/03/1998 | DE19723047A1 Piston for e.g. Otto engine |
| 11/19/1998 | DE19715611A1 Compression piston ring anti-twist lock for esp. two-stroke piston engine |
| 11/18/1998 | EP0878647A2 Piston ring made of cast iron |
| 11/18/1998 | CN1199166A Tension measuring apparatus and method for piston ring |
| 11/17/1998 | US5836589 Aluminum alloy, automobile transmission |
| 11/11/1998 | EP0877239A1 Tension measuring apparatus and method for piston ring |
| 11/11/1998 | EP0877160A1 Cooling gallery for pistons |
| 11/05/1998 | WO1998049472A1 Fractured seal ring |
| 11/05/1998 | DE19715758C1 Kolben für eine Hubkolbenbrennkraftmaschine Piston for an internal combustion piston engine |
| 10/22/1998 | WO1998046915A1 Internal combustion piston engine |
| 10/22/1998 | WO1998046914A1 Internal combustion piston engine |
| 10/21/1998 | CN1040354C Mechanical sealing device and producing method thereof |
| 10/15/1998 | CA2234995A1 High pressure seal assembly |
| 10/14/1998 | EP0870135A1 An improved piston ring |
| 10/13/1998 | US5820131 Piston ring having wear coating consisting of Cr2 N or a mixture of Cr2 N and Cr |
| 10/08/1998 | WO1998044281A1 Seal apparatus |
| 09/24/1998 | WO1998041749A1 A piston for a two-stroke crosshead engine of the diesel type |
| 09/24/1998 | DE19810309A1 Pressure ring especially second piston ring for aluminium@ cylinder |
| 09/23/1998 | CN2292187Y 液压缸密封装置 Hydraulic cylinder seals |
| 09/16/1998 | EP0864784A1 Piston ring |
| 09/16/1998 | CN2291536Y Piston-ring sealing device |
| 09/10/1998 | DE19715759C1 Kolben für eine Hubkolbenbrennkraftmaschine Piston for an internal combustion piston engine |
| 09/09/1998 | EP0863302A1 Internal combustion engine with horizontal cylinders |
| 09/02/1998 | EP0861391A1 Piston ring |
| 08/26/1998 | CN2289096Y Disk piece for making piston ring |
| 08/26/1998 | CN2289095Y Piston ring with elastic washer |
| 08/26/1998 | CN1191285A Enforced seal oil ring |
| 08/25/1998 | CA2070097C Compression ring for internal-combustion engines |
| 08/18/1998 | US5794943 Piston rings particularly suited for use with ceramic matrix composite pistons and cylinders |
| 08/18/1998 | US5794941 Adapted to engage an annular groove of a piston body |
| 08/12/1998 | EP0857900A1 Piston oil-scraping ring for internal combustion engines |
| 08/12/1998 | CN1190441A Cast iron and piston ring |
| 08/05/1998 | CN2287234Y Lip seal |
| 08/05/1998 | CN1189884A Piston ring for a piston in an I. C. engine |
| 08/04/1998 | US5788246 Seal device for piston rod |
| 07/21/1998 | US5782217 Piston for two cycle engine |
| 07/16/1998 | WO1998008009A3 Packing seal |
| 07/15/1998 | EP0853191A1 The piston compression ring assemblies being self-lubricated and self-adjusted |
| 07/15/1998 | CN1187873A Sealing washer |
| 07/15/1998 | CN1187871A Sealing ring |
| 07/15/1998 | CN1187870A 密封圈 Ring |
| 07/15/1998 | CN1039151C Compound piston ring with filler polytetrafluorethylene guide ring |
| 07/14/1998 | US5779244 Seal apparatus |
| 07/14/1998 | US5779243 Piston ring set for reciprocating engines |
| 07/14/1998 | CA2023718C Steel oil ring assembly |
| 07/08/1998 | EP0851984A1 Piston ring and piston assembly in an internal combustion engine |
| 07/08/1998 | EP0707092B1 Slide member and method of its production |
| 07/07/1998 | US5775201 Piston arrangement for a percussion tool |
| 06/30/1998 | US5773734 Nitrided powdered metal piston ring |
| 06/25/1998 | WO1998027328A1 Piston for internal combustion engine and method for manufacture thereof |
| 06/25/1998 | DE19610809A1 Sealing arrangement between piston and cylinder |
| 06/24/1998 | EP0849511A2 Compression piston ring |
| 06/23/1998 | US5768752 Puzzle-lock compression ring |
| 06/18/1998 | DE19707131C1 Oil scraper piston ring for internal combustion engine |
| 06/17/1998 | CN2284321Y Inlaying-sealing piston ring |
| 06/10/1998 | EP0754270B1 Machine having a cylinder and a piston, and piston ring seal therefor |
| 06/10/1998 | DE19708893C1 Locking element for piston ring in piston's annular groove |
| 06/09/1998 | US5763106 Ceramic carbide powder containing nickel and chromium, solid lubricant comprising molybdenum disulfide, lead oxide, graphite, silver, titanium oxide |
| 06/04/1998 | DE19704754C1 Oil scraper piston ring system, particularly for internal combustion engines |
| 05/26/1998 | US5756150 Method of spraying particulate materials on a solid surface materials |
| 05/20/1998 | EP0842356A1 Engine block for a multi-cylinder internal combustion engine |
| 05/20/1998 | EP0695894B1 Compression ring for an internal combustion engine |
| 05/14/1998 | DE19708892C1 Reciprocating internal combustion engine |
| 05/13/1998 | EP0841507A2 Helical compression spring for oil-scraping ring |
| 05/13/1998 | EP0841414A1 Composite chromium plating film and sliding member covered thereof |
| 05/13/1998 | EP0841413A1 Composite chromium plating film and sliding member covered thereof |
| 05/07/1998 | WO1998019084A1 Piston rings and/or a piston in an internal combustion engine of the diesel type and a method of running-in of a diesel engine |
| 05/06/1998 | EP0840039A2 Oil control ring of two piece type for internal combustion engine |
| 04/29/1998 | EP0838616A2 Piston for a pneumatic or hydraulic power cylinder |
| 04/29/1998 | EP0837898A1 Polyimide compositions with improved wear resistance |
| 04/29/1998 | CN1180146A Piston ring |
| 04/28/1998 | US5743707 Contact seal for turbomachines running at high speed and/or having high temperatures in the sealing region |
| 04/28/1998 | US5743535 Compression piston ring seal |
| 04/28/1998 | US5743171 For an internal combustion engine |
| 04/28/1998 | US5743012 Reducing wear between radial side faces of a piston ring groove by alloying and coating ring aluminum alloy piston locally with nickel or cobalt material |