| Patents for F16J 9 - Piston-rings, seats therefor; Ring sealings of similar construction in general (4,592) |
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| 10/06/2004 | CN2646482Y Piston ring |
| 10/06/2004 | CN1535191A Metal ring assembly which is assembled and soldered to support collar in order to form annular cooling conduit of IC engine piston, method of producing said finned metal ring and metal ring thus |
| 10/06/2004 | CN1533860A Application of laser welding in manufacturing seal piston ring |
| 10/06/2004 | CN1170069C Improved tangram type locked pressure ring and its manufacturing method |
| 09/30/2004 | WO2004023005A3 Sealing ring |
| 09/30/2004 | US20040187679 Uniform piston ring fill |
| 09/29/2004 | EP1462684A1 Piston device |
| 09/29/2004 | EP1461532A1 Self-lubricating plastics material for sealing elements |
| 09/23/2004 | DE10311155A1 Motor vehicle shaft seal ring has angled inner fluid engaging and support faces and axial sealing face |
| 09/22/2004 | EP1460318A1 Piston ring coating |
| 09/22/2004 | CN2643082Y A hydrocylinder for hydraulic lifting device of tractor |
| 09/22/2004 | CN2643081Y Superpressure selfcompensating composite sealing arrangement |
| 09/21/2004 | US6793222 Oil scraper piston ring having circumferentially distributed recesses |
| 09/16/2004 | WO2004079221A1 Piston for shock absorber |
| 09/16/2004 | WO2004079177A1 Reciprocating engine |
| 09/15/2004 | EP1456519A1 Piston ring carrier with a cooling channel |
| 09/09/2004 | US20040173169 Cooled ring carrier for a piston |
| 09/08/2004 | CN2639621Y Circulation spring piston ring double oil rings |
| 09/02/2004 | WO2004074717A1 Combination oil ring |
| 09/01/2004 | EP1341946B1 Wear protection layer for piston rings, containing wolfram carbide and chromium carbide |
| 08/26/2004 | DE10308069B3 Piston ring for scraping cylinder has cross-section variation extending between inner circumferential surface and piston flank |
| 08/25/2004 | EP1448918A1 Piston for an internal combustion engine |
| 08/19/2004 | DE10304565A1 Kolbenring Piston ring |
| 08/12/2004 | WO2004067940A1 Piston assembly for an internal combustion engine |
| 08/12/2004 | US20040154558 Coolable annular support for intentionally cooled piston rings and method for the production thereof |
| 08/12/2004 | DE10358548A1 Sealing and guiding element for piston or slide of reciprocating piston engine has single or multi-section piston ring each with at least one communication path which connects high pressure side of piston ring to respective slide face |
| 08/11/2004 | EP1445518A1 Piston ring |
| 07/28/2004 | EP1441156A1 Piston seal |
| 07/28/2004 | CN2628814Y Auxiliary press ring for cylinder piston ring |
| 07/28/2004 | CN2628813Y Piston ring with complementary function |
| 07/28/2004 | CN1515792A Seal of piston and ring |
| 07/22/2004 | US20040140624 Piston ring |
| 07/21/2004 | CN1514125A 组合油环 Combination oil ring |
| 07/15/2004 | US20040134457 Piston assembly with piston ring support and sealing member |
| 07/15/2004 | DE10011918B4 Kolbenring mit Verschleissschutzschicht Piston ring wear-with |
| 07/08/2004 | DE10127020B4 Kolbenring mit einer Oxid-Nitrid-Verbundschicht Piston ring with an oxide-nitride composite layer |
| 07/07/2004 | CN2623968Y Circumambient spring type piston ring |
| 06/30/2004 | EP1433838A1 Slide member |
| 06/30/2004 | CN2622490Y Composite seal device for oil tank |
| 06/30/2004 | CN2622489Y End direction positioning combined closed type piston ring |
| 06/30/2004 | CN1508396A Structure for connecting or space sealing members with different thermal expansion coefficients |
| 06/24/2004 | US20040119242 Combined oil ring |
| 06/23/2004 | EP1431631A1 Piston ring |
| 06/23/2004 | EP1431630A2 Combined oil ring |
| 06/17/2004 | US20040113368 Sealing device and method for assembling the sealing device |
| 06/10/2004 | US20040108025 Ring supports are annealed in a vacuum or in a reducing hydrogen atmosphere, at temperatures between 900 degrees C. and 1130 degrees C |
| 06/09/2004 | EP1426561A2 Structures for attaching or sealing a space between components having different coefficients or rates of thermal expansion |
| 06/09/2004 | CN2620137Y Combined sealnig ring for hydraulic cylinder |
| 06/09/2004 | CN2620136Y Piston ring |
| 06/02/2004 | CN1501986A Wear-resistant sliding member |
| 05/26/2004 | CN1500154A Nickel-aluminide based wear-resistant material for piston rings |
| 05/26/2004 | CN1500153A Intermetallic wear-resistant material for piston rings |
| 05/26/2004 | CN1499094A Slide element |
| 05/20/2004 | US20040094902 Piston ring for piston engines |
| 05/19/2004 | CN1150402C Tension measuring apparatus and method for piston ring |
| 05/13/2004 | WO2004040178A1 Valve |
| 05/13/2004 | WO2004040174A1 Oil ring |
| 05/13/2004 | DE10256765B3 Piston ring for flat piston of hydraulic shock absorber has sealing surface extending in peripheral direction for preventing leakage of hydraulic fluid between opposite sides of piston |
| 05/13/2004 | DE10251385A1 Ventil Valve |
| 05/12/2004 | CN2615439Y Piston with double-ring closure; alternate opening use structure |
| 05/12/2004 | CN1496457A 往复活塞式发动机 Reciprocating piston engine |
| 05/06/2004 | WO2004038207A1 Gap-sealed piston ring, gap-sealed ring-reduction piston engine and ring-reduction reciprocating mechanism |
| 05/06/2004 | DE10248215A1 Sealing device has sealing component in contact with housing wall which has cross sectional profile and pipe element in contact region of sealing component provided with recess by which sealing component is movable in radial direction |
| 05/05/2004 | CN1494641A Side rail for reduction of oil consumption and combined oil control ring in corporated with the side rails |
| 04/29/2004 | WO2004036019A1 Piston assembly and method of manufacture |
| 04/29/2004 | US20040080114 Intermetallic wear-resistant material for piston rings |
| 04/28/2004 | EP1413806A1 Steel piston ring |
| 04/28/2004 | EP1413372A1 Metal ring assembly which is assembled and soldered to a support collar in order to form the annular cooling conduit of an internal combustion engine piston, the method of producing said finned metal ring and the metal ring thus obtained |
| 04/28/2004 | CN1492978A Piston ring and method for producing the same |
| 04/28/2004 | CN1492136A Cut sealing double ring piston engine and working unit |
| 04/27/2004 | US6726218 Compression piston ring for use in internal combustion engine |
| 04/27/2004 | US6726217 Piston ring for the piston of an internal combustion engine |
| 04/27/2004 | US6726216 Piston ring with oxide-nitride composite layer |
| 04/22/2004 | US20040076851 Nickel-aluminide based wear resistant material for piston rings |
| 04/22/2004 | US20040074467 Sliding structure for automotive engine |
| 04/21/2004 | EP1411145A1 Sliding structure for automotive engine |
| 04/21/2004 | EP1409896A1 Oil-scraper piston ring and a method for producing an oil-scraper piston ring |
| 04/21/2004 | CN2612838Y High pressure air pump piston ring arrangement with bearing ring |
| 04/15/2004 | US20040069263 Method for producing a ring support with a sheet metal cooling channel welded thereon |
| 04/15/2004 | US20040069141 Wear protection layer for piston rings, containing wolfram carbide and chromium carbide |
| 04/14/2004 | EP1407173A2 Cooled ring carrier for a piston |
| 04/14/2004 | CN2611618Y Crossing piston ring |
| 04/14/2004 | CN1488849A 组合式密封活塞环 Combined piston ring seal |
| 04/13/2004 | US6719297 Piston ring, in particular for a piston of a vibration damper |
| 04/08/2004 | DE10341782A1 Kompressionsringe mit winkligem Spalt und Endenhinterarbeitung Compression rings with angled rear end gap and elaboration |
| 04/07/2004 | EP1404960A1 Coolable annular support for internally cooled piston rings and method for the production thereof |
| 04/07/2004 | EP0832381B1 Sealing washer for a piston shaft |
| 04/06/2004 | US6715767 Angled gap compression rings with end relief |
| 04/01/2004 | US20040061291 Side rail and combined oil control ring incorporated with the side rails for reduction of oil consumption |
| 03/31/2004 | CN2608774Y Piston ring with sealing chip |
| 03/30/2004 | US6712363 Compression ring sealing device with end gap control and a method of manufacturing same |
| 03/25/2004 | US20040056425 Piston ring and method of producing the same |
| 03/24/2004 | EP1157229B1 Piston with at least one ring groove and at least one piston ring |
| 03/18/2004 | WO2004023005A2 Sealing ring |
| 03/18/2004 | US20040051252 Angled gap compression rings with end relief |
| 03/18/2004 | CA2497912A1 Sealing ring |
| 03/17/2004 | CN2606823Y Guard sheet sealed type piston ring |
| 03/16/2004 | US6706242 Heat resistant Al die cast material |
| 03/16/2004 | US6705616 Piston ring device in internal combustion engine |
| 03/11/2004 | US20040046329 Sealing ring |