Valve plate for axial hydraulic piston pump or motor

Abstract

A valve plate for a axial hydraulic unit where the mass of the front side is equal to the backside and the masses of the front side and the backside are equally distributed over the area of the sides of the plate. This improvement makes the manufacturing costs higher but significantly reduces the operating costs which makes it more economical.

I claim:  
     
         1 . A valve plate used in an axial hydraulic piston pump/motor which is made of a hardened material where the mass of the front side of the valve plate and the mass of the backside of the valve plate are equal within design tolerance limitations and said masses are equally distributed over the surfaces of the front and back side of the valve plate.