EMERGENCY BRAKE WITH TOGGLE LOCK PAWL

摘要

A brake actuator of the type used to operate vehicle emergency brakes wherein the actuator includes a pivotally mounted lever having ratchet teeth defined thereon. The lever is restrained against movement in a brake releasing direction by a pawl engaging the lever ratchet teeth, the pawl being pivotally mounted upon a pivotally mounted support wherein the pawl comprises a toggle, and a cam surface is employed in the release structure to minimize the force required to release the locked pawl. The toggle-type pawl permits the pawl teeth to "unroll" during disengagement of the pawl and ratchet teeth, and the double pivot mounting of the pawl makes it possible for several pawl teeth to simultaneously effectively engage the ratchet teeth.