US 6,981,321 B1
Hydrostatic cylinder block and method of making the same
Robert J. Stoppek, Mundelein, Ill. (US)
Assigned to Sauer-Danfoss Inc., Ames, Iowa (US)
Filed on Sep. 29, 2003, as Appl. No. 10/673,945.
Int. Cl. B23P 15/00 (2006.01); F01B 3/00 (2006.01)
U.S. Cl. 29—888.02 5 Claims
OG exemplary drawing
 
1. A method of making a cylinder block for a rotatable hydrostatic power member, comprising steps of:
forming a base plate having a center opening with arcuate kidney-shaped uniformly spaced radially located bores and a flange;
forming a cylinder block having a center cylindrical bore, uniformly spaced radially located cylindrical bores having a smaller diameter than the center cylindrical bore, and a lip that extends into and mates with the flange of the base plate;
securing the base plate to the cylinder block along the lip and flange;
disposing a wave spring through the center cylindrical bore;
forming a hub and disposing the hub through the center cylindrical bore so that the hub is partially within the cylinder block.