SLACK ADJUSTER FOR DISC BRAKE

摘要

A pneumatically controlled hydraulically actuated disc-type brake mechanism for use on a wheel and axle assembly of a railway vehicle truck includes a hydraulic-type slack adjuster mechanism automatically operative to compensate for wear of a braking element. The hydraulic-type slack adjuster mechanism comprises a variable volume accumulator into which a hydraulic medium or fluid is forced upon the occurrence of wear of a braking element while a brake application is in effect and from which hydraulic fluid subsequently flows to two pair of hydraulic brake applying cylinders upon initiating a brake release to increase the volume thereof thereby to compensate for brake element wear. Prior to completion of the brake release, hydraulic fluid flows from a storage reservoir to the accumulator to replace that previously supplied from the accumulator to the hydraulic brake applying cylinders.