Patent ID: 6494126
Filing Date: 2002-12-17
Classification: F03C

Abstract:
A radial-piston hydraulic motor (10), comprising:at least one stationary cylinder assembly (1); a piston (16a1, 16a2) having a press wheel (17a1, 17a2 . . . ) is disposed in a cylinder space (p1, p2) of said assembly said piston moves radially back and forth; a cam ring (12) having a web-shaped face (12a), said cylinder spaces (p1, p2) of said piston is structured and arranged to receive a hydraulic fluid said press wheel (17a1, 17a2 . . . ) of the pistons (16a1, 16a2 . . . ) having a power stage position wherein said press wheel is forcibly in contact with the wave-shaped face (12a) of the cam ring (12) and bring the cam ring (12) into a revolving movement; a box frame (11) having a distributor valve (13) connected to the cam ring (12), said distributor valve controlling the pressurized fluid flow into the cylinder spaces (p1, p2 . . . ) of the pistons (16a1, 16a2 . . . ); a non-revolving shaft (14) having ducts (e1, e2) in contact with a cylinder frame(15) of said at least one cylinder groups (1); wherein the sense of rotation of the motor can be reversed by reversing the direction of flow of the fluid through the distributor valve (13), and that the fluid is passed to the distributor valve (13) through the sets of ducts (e1, e2) in the shaft (14) which is placed in a stationary position together with the cylinder frame(s) (15) of at least one cylinder groups (1); and wherein the distributor (13) has a duct (31) that communicates with the power pressure and which is opened on the side face (13a) of the distributor (13), in which connection the force is applied, through the fluid at the power pressure, to the side face (13a) of the distributor (13).