US 4,733,756 A · Brake adjusters

Abstract

The present invention provides a brake actuation and adjuster system comprising means for applying brake actuation pressure both to a brake actuator member and to a pump. The pump is arranged to pump pressure fluid to an adjuster control valve and an adjuster actuator, and the brake actuator member is arranged to be moved by said brake actuation pressure to then open the adjuster control valve against the pressure of the pressure fluid after the brake actuator has moved to a predetermined release position. Thus, in one embodiment, brake actuation pressure primes the pump causing the pump to force pressure fluid to the adjuster actuator. If adjustment is necessary, it is effected until the adjuster control valve is opened to release the pressure fluid. Thus a simple, independent adjuster arrangement is provided which does not affect available brake performance.

Claims10

Dependent claims

A brake actuating and adjuster system comprising a brake actuator member and a pump, means for applying brake actuation pressure to said pump and to said brake actuator member to operate said pump and control the application of a brake, respectively, an adjuster actuator and an adjuster control valve connected to said pump for receiving pressure fluid therefrom upon operation thereof, said adjuster control valve controlling the flow of pressure fluid between exhaust and the connection between said adjuster actuator and said pump, said pressure fluid acting on said control valve to hold it closed, and means responsive to the movement of the brake actuator member to a predetermined release position to open the adjuster control valve against the pressure of said pressure fluid and relieve to exhaust any fluid pressure in the connection between said pump and said adjuster actuator.

Dependencies are inferred from the claim text.

Brake adjusters

Life of this patent

Brake adjusters

Life of this patent

Abstract

Claims10