Patent ID: 7162871
Filing Date: 2007-01-16
Classification: F04B,F16D,F16H

Abstract:
1. A pump unit comprising: a pump shaft operatively connected to a driving source; a cylinder block rotatably driven by the pump shaft; a piston unit accommodated in the cylinder block in a slidable manner in an axial direction; a movable swash plate oscillatable on an operational axis perpendicular to the pump shaft, the movable swash plate defining a slide range of the piston unit in abutment against the piston unit; a transmission gear supported by the pump shaft in a relatively non-rotatable manner, the transmission gear being disposed in such a manner as to face to the movable swash plate; a driven member operatively driven by the transmission gear; and a pump case supporting the pump shaft and accommodating therein the cylinder block, the piston unit, the movable swash plate, the transmission gear and the driven member; wherein the transmission gear has a recess in conformity with an oscillation trail of the movable swash plate at a surface facing to the movable swash plate.