Patent ID: 6802244
Filing Date: 2004-10-12
Classification: F01B,F04B,Y10T

Abstract:
A method of making a cylinder block for a rotatable hydrostatic power member, comprising,making a base plate having a center opening with arcuate kidney-shaped openings and uniformly spaced radially located bores arranged on opposite faces of the plate in registering positions, positioning a drive shaft adapter in the center opening of the base plate and connecting them together, placing a plurality of longitudinally extending semi-circular grooves in an outer surface of the drive shaft adapter to receive semi-circular portions of a plurality of cylindrical piston bore elements, forming a plurality of cylindrical piston bore elements in fixed relation to each other in parallel relationship with a center space among the bore elements having a diameter greater than the center opening of the drive shaft adapter, with the piston bore elements being of a size and position to be slidably inserted in mating relationship with the semi-circular grooves on the outer surface of the drive shaft adapter, slidably positioning the assembly of cylindrical piston bore elements into mating relationship with the semi-circular grooves on the outer surface of the drive shaft adapter, forming a cylindrical torque ring having a circular side wall with a plurality of elongated arcuate grooves on inner surfaces thereof of a size and shape to matingly engage external surface portions of the piston bore elements, slidably mounting the torque ring on the assembly of cylindrical bore elements to matingly engage external surface portions of the piston bore elements, to interlock the cylinder block together to insure the transfer of torque throughout the respective components.