Hydraulic pump or motor
AssigneeGresen Manufacturing Company
InventorWilliam T. Stephens
Life of this patent
Estimating the term…
Abstract
A fluid pressure device comprising a pump or motor having a rotating internal assembly comprising linear pistons and cylinders operated through a "swash" plate to actuate the pistons to provide output pressure. The swash plate is mounted to the drive shaft through a universal connection and the cylinder and piston assemblies are coupled to their component parts through universal swiveling ball and socket connections. Special spring washers are provided for insuring a sliding seal between the internal cylinders and a valving plate, and the valve ports are designed for noise minimization.
Claims15
A hydraulic pump or motor, comprising:
- (a) a housing defining a fluid inlet and a fluid outlet;
- (b) a shaft rotatably carried by the housing;
- (c) reciprocating piston-cylinder pumping means;
- (d) actuating means associated with the rotatable shaft for reciprocating the pumping means as the shaft rotates;
- (e) valving means for alternately connecting the pumping means with the inlet and outlet as it reciprocates;
- (f) and carrying means defining a socket for pivotally carrying a part of the pumping means relative to the valving means;
- (g) the pumping means comprising
- (i) a cylinder member defining a cylindrical bore of constant diameter and open at both ends, the exterior surface of the cylinder member defining a partial spherical surface disposed in and carried by said socket;
- (ii) and a piston member reciprocally disposed in the cylinder, the piston member being operatively connected to the actuating means.
Dependencies are inferred from the claim text.