ELECTRIC SURGE BRAKE

摘要

The invention includes a pair of tubular telescoping members having limited relative longitudinal movement with one secured to a tractor and the other to a trailer. An electrically driven actuator unit has a linearly adjustable primary actuator member for the trailer brakes located within the rear end portion of the trailer tubular member for movable support of its front end within the tractor tubular member. An abutment member in the tractor tubular member is arranged in linear alignment with the primary actuator for selective abutting engagement therewith. A secondary actuator for the trailer brakes is movably supported on the trailer tubular member rearwardly of the actuating unit for connection to the rear end of the actuating unit. A control circuit for the actuating unit is selectively operable to move the primary actuator to defined positions providing for a movement of the secondary actuator to a first position wherein the trailer brakes are rendered inoperative; to a second position wherein the trailer brakes are operated in response to deacceleration of the tractor vehicle; and to a third position wherein the trailer brakes are fully applied and locked in a trailer parking position.