Linear pump has cylinder and pump element cooperated with cylinder, where pump element is movable for pumping medium between position lying behind in pump direction and another position lying front in pump direction

摘要

The linear pump (1) has a cylinder (46) and a pump element (40) cooperated with the cylinder, where the pump element is movable for pumping a medium between a position lying behind in pump direction and another position lying front in the pump direction. A drive (3) acts on the pump element. The pump element is formed from a piston (41) and another concentrically arranged piston (42). A front surface of the former piston is formed in a circular shape and a front surface of the latter piston is formed in an annular shape.