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.

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.