Valve seal with O-ring and backup ring

Details Valve seal with O-ring and backup ring Valve seal with O-ring and backup ring

1979-10-15

1981-09-29

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277171, 277176, 277177, 277188A, F16J 1518

Patent

active

042918901

ABSTRACT:
A seal structure for use in high pressure pneumatic or hydraulic fluid actuators. A solid toroidal shaped elastomeric O-ring and a solid toroidal shaped backup ring are emplaced in a specially configured circumferential groove on an internal sleeve. A conical shaped ramp in the groove bottom permits the use of a solid backup ring with a larger internal diameter for ease of installation over intervening lands on the sleeve without distortion of the backup ring beyond its elastic limit. The difference in the sizes of the symmetrical O-ring and backup rings assist in their proper installation on the sleeve.

REFERENCES:
patent: 2349170 (1944-05-01), Jackman
patent: 2420104 (1947-05-01), Smith
patent: 2427787 (1947-09-01), Hunter
patent: 2437814 (1948-03-01), Hallen
patent: 2456356 (1948-12-01), Aber
patent: 2462586 (1949-02-01), Whittingham
patent: 2747954 (1956-05-01), Damm et al.
patent: 2749193 (1956-06-01), Traub
patent: 3269737 (1966-08-01), Freese
patent: 3455566 (1969-07-01), Hull et al.
patent: 3968971 (1976-07-01), Mariaulle

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