Lip type oil seal

Details Lip type oil seal Lip type oil seal

1977-11-21

1978-10-31

Ward, Jr., Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 29, 277 70, 277152, 277165, 277215, F16J 1532

Patent

active

041230680

ABSTRACT:
A lip type oil seal for a cylinder and piston arrangement, such as in a fluid clutch, wherein the seal separates two working chambers formed by the piston and cylinder. The seal has radial grooves formed in an annular surface facing one chamber, a flat annular sealing surface facing toward the other chamber, and a radial lip portion sealing on the circumference of the piston. The radial grooves permit fluid flow between the chambers when both chambers are exhausted after being pressurized. The flat annular sealing surface prevents fluid flow between the chambers when only the one chamber is pressurized and not exhausted.

REFERENCES:
patent: 2979350 (1961-04-01), Lansky
patent: 3044786 (1962-07-01), Chillson
patent: 3321056 (1967-05-01), Winchell et al.
patent: 3525530 (1970-08-01), Bauer et al.
patent: 3541887 (1970-11-01), Van Lent et al.
patent: 3678809 (1972-07-01), Doutt
patent: 3829104 (1974-08-01), Green

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