Dual lip seal device

Details Dual lip seal device Dual lip seal device

1988-05-20

1989-04-18

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277134, 277215, F16J 1532

Patent

active

048220590

ABSTRACT:
A lip seal device for sealing the gap between a housing and a rotary shaft comprises a case surrounding the rotary shaft, a plurality of lip seals fitted inside the case and including at least two lip seals, support means for holding the lip seals on the outer circumferential portions thereof and seal means located on the outside of the circumferential surface of the case. The inner circumferential portions of the lip seals are curved toward the sealed fluid and have a sealing surface in contact with the outside circumferential surface of the rotary shaft. The contact pressure of the lip seal furthest from the sealed fluid is lower than the contact pressure of the lip seal closest to the sealed fluid.

REFERENCES:
patent: 2329028 (1943-09-01), Austin
patent: 2990220 (1961-06-01), Malone
patent: 3275331 (1966-09-01), Mastrobattista et al.
patent: 3445121 (1969-05-01), Lineker
patent: 3857156 (1974-12-01), Clark
patent: 3929341 (1975-12-01), Clark
patent: 4093241 (1978-06-01), Muntjanoff et al.
patent: 4411478 (1983-10-01), Olschewski et al.
patent: 4623153 (1986-11-01), Nagasawa
patent: 4635946 (1987-01-01), Stanley

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