Brake bleeder check valve

Fluid handling – Systems – Flow path with serial valves and/or closures

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Details

188352, F16K 1120

Patent

active

049896393

ABSTRACT:
A brake bleeder check valve comprising an elongated bleeder valve body to seat in the bleeder valve recess of a wheel brake housing of a hydraulic brake system for vehicles, to seal the bleeder valve recess closed until the bleeder valve body is loosened for the purpose of bleeding air from the hydraulic lines. An inlet aperture is sealed off from hydraulic fluid in the brake system when the valve body is tightened and fully seated in a bleeder valve recess. A hemi-spherical check valve seat is provided between first and, second passageways of the valve, and a ball check valve is positioned in the larger diameter first passageway together with a coiled compression spring to normally bias the ball check valve to the check valve closed position. When the brake pedal is depressed during a bleeding operation and with the valve body loosened in the bleeder valve recess, hydraulic fluid and entrapped air are forced into the recess to enter the inlet aperture in the side wall of the valve body and on to the ball check valve. The pressurized hydraulic fluid pushes the ball check valve open to continue on through the first passageway and out through the outlet aperture. The brake bleeder valve does not have to be re-tightened in the bleeder valve recess between each downward stroke of the brake pedal to prevent leakage of hydraulic fluid and re-introduction of air into the lines during the interim between downward strokes.

REFERENCES:
patent: 2771093 (1956-11-01), Wilson
patent: 3050080 (1962-08-01), Pagano
patent: 3913619 (1975-10-01), Aulner, Sr. et al.
patent: 4318460 (1982-03-01), Kosinski
patent: 4470577 (1984-09-01), Warwick
patent: 4834140 (1989-05-01), Schmidt

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