Dual radial piston pump or motor
AssigneeCaterpillar Tractor Co.
InventorsWillard Q. Haak, Guy C. Carlson, Jr.
Life of this patent
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Abstract
A radial piston pump comprises a housing having a drive shaft rotatably mounted therein and a pair of longitudinally spaced pumps each having a rotor thereof operatively connected to the shaft for rotation therewith. Each pump further comprises a pintle valve mounted in the housing and having a respective rotor rotatably mounted thereon for communicating fluid from an inlet of the housing to an outlet thereof. Each pump further comprises a plurality of circumferentially spaced and radially extending pistons secured thereon with each of the pistons having a cylinder reciprocally mounted on an end thereof for pumping fluid from the inlet to the outlet upon rotation of the rotor which is mounted in eccentric relationship relative to a chamber formed in the housing.
Claims10
A dual radial piston apparatus comprising
- a housing,
- a single shaft mounted in said housing for rotation about a longitudinal axis thereof,
- inlet means defined in said housing for communicating fluid therein,
- outlet means defined in said housing for communicating fluid therefrom, and
- a pair of longitudinally spaced pump means each mounted in a cylindrical chamber defined in said housing, each of said pump means comprising
- pintle valve means mounted in said housing and communicating with said inlet means via first passage means and with said outlet means via second passage means,
- a cup-shaped rotor operatively connected to said shaft at a spline connection for rotation therewith, whereby the rotor of each of said pump means is connected to said single shaft, and rotatably mounted on said pintle valve means in eccentric relationship relative to said chamber for communicating fluid from said first passage means to said second passage means upon rotation of said rotor,
- a plurality of circumferentially spaced and hollow piston means secured on said rotor to extend radially outwardly therefrom and
- a cylinder means reciprocally mounted on the end of each of said piston means and disposed in sliding bearing contact internally of said chamber for pumping fluid through said second passage means and to said outlet means upon rotation of said rotor.
Dependencies are inferred from the claim text.