Wiping and/or sealing element as well as process for sealing...

Seal for a joint or juncture – Seal between relatively movable parts – Piston ring or piston ring expander or seat therefor

Reexamination Certificate

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Details

C277S435000, C277S451000, C277S452000, C277S310000

Reexamination Certificate

active

11053611

ABSTRACT:
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 piston (11) by means of a seal inserted into a groove (21, 30) and a clamping and/or support element with a piston (21), which is guided in a housing (10) such that it can be withdrawn and extended, wherein the piston (11) is sealed by means of a seal arranged in a groove (21). To achieve sealing of the piston (11) with a high sealing force for high liquid pressures at low friction, the wiping and/or sealing element according to the present invention as well as the clamping and/or support element according to the present invention are wherein the seal is a quad ring (22) with a square cross section.

REFERENCES:
patent: 2983533 (1961-05-01), Tisch
patent: 3007723 (1961-11-01), Clarke
patent: 3542380 (1970-11-01), Klein et al.
patent: 3622168 (1971-11-01), Woodling
patent: 3642293 (1972-02-01), Woodling
patent: 3831952 (1974-08-01), Geffroy
patent: 4878766 (1989-11-01), Boyd
patent: 5040905 (1991-08-01), Boyd
patent: 6145753 (2000-11-01), Yano et al.
patent: 6908070 (2005-06-01), Bartos et al.
patent: 2004/0164496 (2004-08-01), Okada et al.
patent: 1 394 452 (2004-03-01), None

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