Brake bleeder check valve

Details Brake bleeder check valve Brake bleeder check valve

1988-11-07

1989-09-26

Fox, John

Fluid handling

Systems

Flow path with serial valves and/or closures

251215, F16K 1518

Patent

active

048692921

ABSTRACT:
A brake bleeder check valve comprising an elongated valve body to thread and seat in a valve recess of a wheel brake housing of a hydraulic brake system for vehicles, to seal the recess closed until the bleeder check valve is loosened to bleed air from the hydraulic system. The valve body has an internal passageway and check valve through which hydraulic fluid and air can be discharged under pressure from depressing the vehicle's brake pedal, after which the check valve closes the passageway to prevent intake of air as the vehicle's brake pedal is let out in preparation for another downward stroke to expel another quantity of hydraulic fluid and air. The bleeder valve does not have to be tightened down after each downward stroke of the brake pedal. A thin layer of sealing material is provided around the threads of the bleeder valve to prevent seepage of air past the threaded portion of the valve body and valve recess when the bleeder valve is in its loosened position.

REFERENCES:
patent: 1478584 (1923-12-01), Schweinert
patent: 1697217 (1929-01-01), Zerk
patent: 2771093 (1956-11-01), Wilson
patent: 2865398 (1958-12-01), Popovich
patent: 3050080 (1962-08-01), Pagano
patent: 3913619 (1975-10-01), Aulner, Sr. et al.

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