Hydraulic thruster for pipe bending machines

摘要

Hydraulic impeller for tube bending machines for use in combination with a head fitting incorporating tube bending formers comprising a drive cylinder with a sliding piston within it having opposite faces of different effective surfaces a pump cylinder and a piston movable in said pump cylinder by means of a hand-operated lever, the pump cylinder being connected by means of a spring-loaded valve to the end of the motor cylinder adjacent to the piston face with the smallest effective surface and being connectable to the other end of the motor cylinder by means of the spring-loaded valve and of a valve that can be operated by hand or by a second valve that can be operated by hand associated with the first-mentioned valve that can be operated by hand. (Machine-translation by Google Translate, not legally binding)