Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1980-11-28
1982-12-07
Ward, Jr., Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277 70, 277195, 277198, F16J 1548
Patent
active
043623042
ABSTRACT:
A packing arrangement for a floating piston dividing a cylinder into first and second chambers comprising a circumferential groove formed in the sliding surface of the floating piston; a circumferential elevation dividing the bottom of the groove into first and second spaces situated on either side of the elevation; backing material placed in the groove; a sealing ring radially situated upon the backing material; first and second extensions on the backing material projecting into the first and second spaces, respectively; each extension having first and second lips forming an annular space between the bottom of the groove and the internal surface of the backing material; the first lip of each extension abutting a lateral wall of the groove and the second lip of each extension abutting a lateral surface of the elevation; a first pressure channel connecting the first chamber with the annular space formed by the first extension; and a second pressure channel connecting the second chamber with the annular space formed by the second extension.
REFERENCES:
patent: 688571 (1901-12-01), Airey
patent: 1392035 (1921-09-01), Williams
patent: 1444407 (1923-02-01), Wefing
patent: 1527834 (1925-02-01), Bullis
patent: 2417873 (1947-03-01), Huber
patent: 3831950 (1974-08-01), Bentley et al.
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