Stepless hydraulic pump control - has rod movable between one pivoted stop set by hydraulic piston and one spring loaded with limited motion

摘要

The control is intended for a hydraulic pump with stepless volume control in both directions by a control rod whose travel is limited in both directions by two stops. The first stop is carried on a lever pivoted in the housing. The lever is moved by the rod of a spring-loaded hydraulic piston. The second stop is carried on a lever pivoted in the housing and spring-loaded to move the stops apart, the spring being connected between the levers. To limit this movement apart, the first lever carries a stop engaged by a cranked extension of the second lever.