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US 12,601,333 B2Granted
Straight axis variable displacement piston pump with rotating swash plate
AssigneeHamilton Sundstrand Corporation
InventorOlaf Enke
Life of this patent
Estimating the term…
Abstract
An axial variable displacement piston pump includes a drive shaft disposed on an axis, a piston barrel comprising a plurality of pistons disposed about the drive shaft, and a swash plate disposed about the drive shaft. Each of the piston barrel and the swash plate are rotationally coupled to the drive shaft such that the drive shaft is configured to simultaneously drive rotation of each of the piston barrel and the swash plate.
Claims20
An axial variable displacement piston pump comprising:
- a drive shaft disposed on an axis;
- a piston barrel disposed about the drive shaft, the piston barrel comprising a plurality of pistons;
- a swash plate disposed about the drive shaft;
- and
- a key disposed between the drive shaft and the swash plate and received in a slot of the swash plate, wherein the swash plate is free to pivot about the key and wherein the slot has a first axial length greater than a second axial length of the key;
- wherein each of the piston barrel and the swash plate are rotationally coupled to the drive shaft such that the drive shaft is configured to simultaneously drive rotation of each of the piston barrel and the swash plate.
3 more elements
An axial variable displacement piston pump comprising:
- a drive shaft disposed on an axis;
- a cradle extending radially outward from the drive shaft and having a concave surface;
- a piston barrel disposed about the drive shaft, the piston barrel comprising a plurality of pistons;
- and
- a swash plate disposed about the drive shaft, the swash plate comprising a hub and a disk;
- wherein each of the piston barrel and the swash plate are rotationally coupled to the drive shaft such that the drive shaft is configured to simultaneously drive rotation of each of the piston barrel and the swash plate;
- and
- wherein the cradle is configured to receive a forward end of the hub, the forward end of the hub slidingly engaged with the concave surface of the cradle.
5 more elements
Dependencies are inferred from the claim text.