Straight axis variable displacement piston pump with feature to minimize piston side loading
AssigneeHamilton Sundstrand Corporation
InventorOlaf Enke
Life of this patent
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Abstract
An axial variable displacement piston pump includes a drive shaft disposed on an axis, a piston barrel having a plurality of pistons disposed about and rotationally coupled to the drive shaft, a swash plate disposed about and rotationally coupled to the drive shaft, and a retention cage connected to the swash plate between the piston barrel and the swash plate. The swash plate and the piston barrel are configured to be simultaneously driven by the drive shaft and the swash plate is configured to tilt relative to the axis. The retention cage is configured to retain the plurality of pistons relative to the swash plate with rotation.
Claims20
An axial variable displacement piston pump comprising:
- a drive shaft disposed on a first axis;
- a piston barrel disposed about and rotationally coupled to the drive shaft, the piston barrel comprising a plurality of pistons;
- a swash plate disposed about and rotationally coupled to the drive shaft, the swash plate and the piston barrel configured to be simultaneously driven by the drive shaft, wherein the swash plate is configured to tilt about a second axis;
- and
- a retention cage connected to the swash plate and extending between the piston barrel and the swash plate, the retention cage configured to retain the plurality of pistons relative to the swash plate with rotation of the swash plate.
Dependencies are inferred from the claim text.