| Patents for F16J 9 - Piston-rings, seats therefor; Ring sealings of similar construction in general (4,592) |
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| 05/17/1990 | WO1990005256A1 Sealing apparatus |
| 05/16/1990 | EP0368004A1 Piston |
| 05/16/1990 | CN2057228U Oil-pumping plunger with multiple filled soft seal |
| 05/09/1990 | EP0366983A1 Piston |
| 05/04/1990 | CA2000798A1 Piston ring |
| 05/03/1990 | DE3935077A1 Carbon deposit prevention on engine piston - involves annular component in groove inside piston ring |
| 05/03/1990 | DE3836577A1 Oil wiping piston ring |
| 05/01/1990 | US4920862 Trunk piston compressor |
| 04/17/1990 | US4917391 Sealing ring assembly |
| 04/17/1990 | US4917302 High temperature flexible seal |
| 04/11/1990 | CN2055883U Overlapped piston-ring sealing device |
| 04/04/1990 | EP0167523B1 Composite pistons and method of manufacturing thereof |
| 04/04/1990 | CN2055550U Blow-by prevented piston ring for air compressors |
| 04/04/1990 | CN2055549U Combined non-clearance piston ring |
| 03/28/1990 | EP0360115A2 Improvements in and relating to piston rings |
| 03/21/1990 | CN1040667A Sealing rings |
| 03/14/1990 | EP0358233A1 Method and device for checking the valve and piston ring sealing in an internal combusion engine |
| 03/13/1990 | US4907545 Liquid cooled piston ring carrier assembly and piston using same |
| 03/06/1990 | US4906109 Spring loaded guide ring |
| 02/13/1990 | US4899983 Anti-wedging pressure seal ring apparatus |
| 02/13/1990 | US4899702 For an internal combustion engine |
| 02/07/1990 | EP0353480A2 Pistons |
| 02/06/1990 | US4898134 Crankcase seal arrangement for two cycle engine |
| 01/31/1990 | EP0352405A1 Method of making a bias cut in a split sealing ring |
| 01/30/1990 | CA1265004A1 Clean air blow-by system for diesel engine |
| 01/25/1990 | WO1990000693A1 A combination seal for sealing between two machine parts |
| 01/24/1990 | EP0351976A2 Pistons |
| 01/24/1990 | EP0351549A1 Spring loaded guide ring |
| 01/10/1990 | EP0350182A2 Internal combustion engines |
| 01/04/1990 | DE3822031A1 Light alloy piston for internal combustion engines |
| 01/03/1990 | EP0348837A2 Method for the manufacture of piston rings |
| 01/03/1990 | EP0348804A2 Wear-resistant component and process for preparing it |
| 01/03/1990 | CN2050510U Multifunction combination sealing device |
| 01/02/1990 | CA1264170A1 Piston ring |
| 12/27/1989 | EP0347547A2 Oval piston ring |
| 12/14/1989 | WO1989012191A1 Sealing rings |
| 12/14/1989 | DE3818928A1 Reciprocating-piston internal combustion engine |
| 12/07/1989 | DE3917951A1 Nitrided piston ring |
| 12/07/1989 | DE3833322A1 Piston ring for internal combustion engines |
| 11/29/1989 | EP0343300A2 Mounting structure of a multiple piston ring |
| 11/28/1989 | US4883029 Piston and piston ring construction |
| 11/23/1989 | DE3815803A1 Piston ring for internal combustion engines |
| 11/21/1989 | US4881455 Piston for use in a gas pump |
| 11/15/1989 | EP0341285A1 Process and device improving the sliding of alternating pistons of thermal engines |
| 11/15/1989 | CN2047739U Controller for designing and machining piston ring face |
| 11/07/1989 | CA1262744A1 Dual spring expander for oil control piston rings |
| 11/01/1989 | CN2046930U Piston construction of internal-combustion engine |
| 10/25/1989 | EP0338448A2 Engine part exposed to sliding friction |
| 10/24/1989 | US4876158 Cobalt metal or cobalt-base alloy as binder with dichromium tr ioxide powder |
| 10/19/1989 | DE3836796A1 Piston ring arrangement |
| 10/11/1989 | EP0222864B1 Multiple part oil-control ring for piston |
| 10/04/1989 | EP0335791A1 Seal for liquids in an appliance with rotating parts and appliance with rotating parts provided with this seal |
| 10/03/1989 | US4871266 Slide assemblies |
| 09/21/1989 | WO1989008797A1 Differential surface roughness dynamic seals and bearings |
| 09/14/1989 | DE3806821A1 Piston ring for internal combustion engines |
| 09/12/1989 | CA1259172A1 Manufacture of piston rings |
| 09/07/1989 | DE3806348A1 Kolbenring Piston ring |
| 08/09/1989 | EP0326658A1 Wear-resistant coating |
| 08/09/1989 | CN2042537U Totally enclosed long life sealing ring |
| 07/27/1989 | DE3801784A1 Lightweight metal piston for internal-combustion engines |
| 07/18/1989 | US4848212 Internal combustion engine piston with two compression rings having reduced oil consumption |
| 07/04/1989 | US4844487 Lock-step duo step split sealing ring |
| 06/26/1989 | EP0305504A4 High pressure reciprocator components. |
| 06/21/1989 | EP0321280A2 Sealing assembly |
| 06/20/1989 | US4840379 Split sealing ring having a bias cut |
| 06/14/1989 | CN1004509B Improved piston ring for a piston in a refrigerant compressor |
| 06/07/1989 | CN2038968U Piston ring |
| 06/06/1989 | US4836093 Piston assembly |
| 06/06/1989 | US4835856 Piston ring manufacturing method |
| 06/01/1989 | WO1989004932A1 Process and device improving the sliding of alternating pistons of thermal engines |
| 05/30/1989 | US4834400 Differential surface roughness dynamic seals and bearings |
| 05/30/1989 | US4834268 Dispensing cartridge with delivery piston |
| 05/30/1989 | US4833977 Piston for internal combustion engine |
| 05/30/1989 | CA1254919A1 Piston rings |
| 05/24/1989 | EP0316751A1 Sealing device |
| 05/17/1989 | CN2037794U 组合式活塞环 Combined Piston |
| 05/16/1989 | US4830719 Rubbing to increase porosity; supplying with electrolyte, electric current |
| 05/16/1989 | US4829883 Pistons |
| 05/16/1989 | CA1254157A1 Piston assembly |
| 05/16/1989 | CA1254087A1 Piston assembly for a refrigerant compressor |
| 05/10/1989 | CN2037413U Composite sealing ring |
| 04/26/1989 | CN1004024B 减压阀 Valve |
| 04/04/1989 | US4817578 Light alloy cylinder block and an alumina and carbon fiber reinforced wall; slidability |
| 03/29/1989 | EP0309442A1 Sliding seal |
| 03/29/1989 | EP0308767A1 Plunger piston compressor |
| 03/28/1989 | US4815429 Piston head for an internal combustion engine and a compression ring therefor |
| 03/23/1989 | DE3824261C1 Method for producing recesses, serving to receive lubricant, on workpiece surfaces |
| 03/22/1989 | EP0307569A2 Piston-cylinder aggregate |
| 03/08/1989 | EP0305504A1 High pressure reciprocator components. |
| 03/07/1989 | US4809646 Two)cycle internal combustion engine |
| 02/23/1989 | WO1989001582A1 Split ring seal assembly |
| 02/14/1989 | CA1249983A1 HIGH PRESSURE RECIPROCATING MOTION COMPRESSOR AND USE THEREOF FOR THE POLYMERIZATION OF ETHYLENE AND .alpha.-OLEFINS |
| 02/01/1989 | CN2031862U Set of pistons |
| 01/24/1989 | US4799694 Piston ring and method of making the same |
| 01/17/1989 | US4798391 Three-piece oil-ring with a slot |
| 01/10/1989 | US4796898 Oil scraper piston ring with elliptical oil vent holes |
| 01/05/1989 | DE3812656A1 Piston ring with a wear-resistant hard layer and a layer of nickel applied to it by plating |
| 01/04/1989 | EP0297659A1 Piston rings |
| 12/28/1988 | EP0296291A2 Slide assembly and valve assembly |
| 12/15/1988 | DE3718005A1 Piston for combustion engines having a pin to secure a piston ring against torsion |