Lip seal for antilock braking system isolation valve and similar

Details Lip seal for antilock braking system isolation valve and similar Lip seal for antilock braking system isolation valve and similar

1994-11-10

1996-06-11

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 29, 277 70, 277205, F16J 1532

Patent

active

055249043

ABSTRACT:
A lip seal having an annular body, a contiguous annular shoulder extending axially therefrom, and a contiguous annular seal lip extending coaxially from the body and flaring away from the shoulder. Strengthening ribs extend axially along the shoulder, the shoulder is undercut to provide space into which areas of the annular seal lip can escape, with each such feature thereby promoting nonuniform deformation of the annular seal lip, ensuring a path for fluid to flow, and thereby minimizing the possibility of a seal lock-up condition occurring when pressure is applied to the back of the lip seal during brake release. Flow ribs axially coextensive with the strengthening ribs also extend along the body to create fluid flow paths therebetween. The radial dimensions of the lip seal are also reduced to allow a valve cartridge of given diameter to function in a smaller housing bore than that required when a conventional lip seal is used, thus facilitating the downsizing of a control valve module in which the valve cartridge is to be used.

REFERENCES:
patent: 3271038 (1966-09-01), Bastow
patent: 4828335 (1989-05-01), Fuller et al.
patent: 5127661 (1992-07-01), Franson et al.
patent: 5246237 (1993-09-01), Gottling et al.
patent: 5328178 (1994-07-01), Nies
Kelsey-Hayes Drawing 1985--1 page.
Kelsey-Hayes Drawing 1993--1 page.

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