Patent ID: 6203283
Filing Date: 2001-03-20
Classification: F01B,F04B

Abstract:
A device for varying displacement of a variable displacement bent axis unit comprising:a housing and a rotatable cylinder block kit disposed inside the housing;a one-piece swingable yoke pivotally mounted in the housing and carrying the cylinder block kit;the yoke comprising a bucket portion for supporting the cylinder block kit and a pair of generally opposing arms extending from the bucket portionone of the arms defining a trunnion bearing portion for swing control, and the other of the arms defining a trunnion portion for fluid porting on the opposing arm, together the trunnion bearing portion and the trunnion portion for fluid porting defining a pivot axis for swinging the yoke;the bucket portion of the yoke including a bottom wall, at least one continuous side wall extending upwardly from the bottom wall, and an open top defining a hollow in the bucket portion; andthe hollow and the trunnion portion for porting being fluidly connected by a pair of spaced apart fluid passages extending continuously completely within the bottom wall and the side wall to the trunnion portion for porting.