AUTOMATIC VALVE CONTROL MECHANISM FOR VEHICLE MOUNTED IMPLEMENTS

摘要

An automatic means for controlling the height to which a loader bucket is raised comprising a valve control mechanism supported by pivotal means adapted to be controlled by a hydraulic jack which, in turn, employs a detented control valve by which the jack is operated and means to disengage the detent to allow the valve to return to a neutral position when the implement reaches a predetermined, raised position. The latter means includes a valve-actuating lever connected to the valve by a mechanical linkage, a control link assembly having a spring-loaded, lost-motion link means as an integral part thereof, and lever means actuating the control link assembly by the pivotal movement of the jack. The lost-motion link means is operable upon adjusting the implement to a predetermined position to forcibly move the actuating lever to disengage the detent means allowing the valve to return to its neutral position.