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| Number | Title | Issue Date |
| 7234704 | Wiping and/or sealing element as well as process for sealing a piston and clamping and/or support element The present invention pertains to a wiping and/or sealing element for sealing a piston (11) guided movably in a housing (10) with a seal held in a groove (21, 30). The present invention pertains, furthermore, to a process for sealing a movable p... | 06/26/2007 |
| 6378872 | Seal assembly In an annular groove carried by one of a pair of reciprocally movable members, a pin extending into the annular groove and a sidewall of the other one of the pair of reciprocally movable members, a seal assembly comprising a ring carried by an annular bod... | 04/30/2002 |
| 5655433 | Piston-piston ring assembly and method for reducing engine exhaust emissions A piston--piston ring assembly for an internal combustion engine reduces hydrocarbon emissions without significantly increasing the cost of the engine. The assembly includes an upper piston ring groove and a piston ring which acts as check valve to preven... | 08/12/1997 |
