ENCLOSED AUTOMATIC SLACK ADJUSTER FOR VEHICLE SHOE BRAKES

摘要

The specification discloses an automatic slack adjuster all moving parts of which are enclosed for connecting a brake rod to an actuating cam shaft for a shoe brake in which the adjuster body is mounted on the actuating camshaft by a worm gear rotatable within the body. A worm shaft which on rotation positions said worm gear in the body extends exteriorly thereof to mount a first ratchet part fixed to the shaft and a second ratchet part rotatable thereon. A fixed housing extending from the body and about the worm shaft accommodates an axially slidable actuating member which develops relative rotational motion between the fixed housing and the second ratchet part when moved from an inner to an outer position or from an outer to an inner position. The actuating member is connected by a tension member to a fixed abutment or anchorage but is normally biased outwardly by a spring, the limit of the outward position being determined by a sealing cap in such manner that all operating mechanism and moving parts are enclosed.