Rod controlled positive lock brake

摘要

A spring-loaded cam plate having a raised portion is mounted on a brake pawl outer surface opposite to its inner toothed surface to be pivotable relative to the pawl along the outer surface. A driver operable control rod is formed with cylindrical and semi-cylindrical portions which are engageable with the raised cam portion of the cam plate to urge the brake pawl into and out of engagement with a brake gear.