TROLLEY BRAKING METHOD AND APPARATUS FOR USE WITH CONVEYORS

摘要

TROLLEY BRAKING METHOD AND APPARATUS FOR USE WITH CONVEYORS A weight bearing trolley moves along a track having flanges between which a guide wheel of said trolley is positioned. The movement of the trolley is monitored to determine when braking is desired and, when desired, pressure is applied to said guide wheel, forcing it into contact with one of said flanges and producing frictional retarding force braking said trolley. A fail-safe actuator utilizes fluid pressure to keep a brake operating spring compressed when braking is not wanted.