Control means adjustably synchronizing operation of a single pump with a plurality of control valves

In a hydraulic circuit for operating a plurality of hydraulic motors by a single pump, a separate valve being operable to communicate actuating fluid to each respective motor, each of the valves being operable by a separate movable actuating element, the single pump under pressure being in communication with each of the valves, synchronizing means for initiating operation of the pump simultaneously with movement of any one of the valves to communicate fluid from the pump to one of the motors, comprising

• a movable gang plate including means for initiating and terminating operation of the pump in response to movement of the gang plate about a fixed pivot point,
• a separate cam shoe being associated with each of the actuating elements for the respective control valves, each of the cam shoes forming an actuating surface arranged generally perpendicular to the fixed pivot axis of the gang plate,
• means adjustably securing the separate cam shoes to the gang plate, and
• a synchronizing lever connected with each actuating element for the respective control valves, each synchronizing lever having a bearing means arranged for engagement with one of the actuating surfaces upon the cam shoes, the synchronizing levers being pivotably movable in response to operation of the respective control valves by their actuating elements to move the bearing means along the actuating surfaces, each of the actuating surfaces having a configuration formed along a plane perpendicular to the fixed pivot of the gang plate for moving the gang plate and causing operation of the single pump in synchronization with the movement of each of the control valves.