Lip seal device

Details Lip seal device Lip seal device

1991-02-19

1992-01-28

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277153, 277215, F16J 1532

Patent

active

050838024

ABSTRACT:
A lip seal device for sealing the gap between a housing and a rotary shaft comprises a case surrounding the rotary shaft, a lip seal attached inside the case a, support for holding the lip seal on the outer circumferential portion thereof and a seal located on the outside circumferential surface of the case. The inner circumferential portion of the lip seal is curved toward the sealed fluid. The lip seal includes a sealing surface provided with an annular groove extending continuously in the circumferential direction of the rotary shaft so that the sealing surface has a first and second sealing portion, the contact pressure of the first sealing portion on the rotary shaft being lower than the contact pressure of the second sealing portion on the rotary shaft.

REFERENCES:
patent: 2329028 (1943-09-01), Austin
patent: 3275331 (1966-09-01), Mastrobattista et al.
patent: 3801114 (1974-04-01), Bentley
patent: 3938813 (1976-02-01), Forch
patent: 4042248 (1977-08-01), Williamitis
patent: 4219205 (1980-08-01), Christianson et al.
patent: 4568092 (1986-02-01), Hayashida
patent: 4623153 (1986-11-01), Nagasawa
patent: 4755115 (1988-07-01), Akaike
patent: 4834397 (1989-05-01), Shimasaki et al.

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