Radial piston pump or motor with unrestricted inlet means
AssigneeCaterpillar Tractor Co.
InventorWilliam K. Engel
Life of this patent
Estimating the term…
Abstract
A radial piston pump comprises a housing having a drive shaft rotatably mounted therein and a rotor operatively connected to the shaft for rotation therewith. A pintle valve is mounted in the housing and the rotor is rotatably mounted thereon for communicating fluid from an inlet of the housing to an outlet thereof. A plurality of circumferentially spaced and radially extended pistons are mounted on the rotor with each of the pistons having a cylinder reciprocally mounted on an end thereof for pumping purposes. The inlet communicates with an inlet side of the pintle valve via a single inlet passage which communicates unrestricted fluid flow therethrough.
Claims10
A radial piston apparatus comprising
- a housing,
- a shaft rotatably 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
- pump means mounted in a cylindrical chamber defined in said housing, said pump means comprising
- pintle valve means mounted in said housing and defining a single inlet chamber therein,
- a rotor operatively connected to said shaft for rotation therewith and rotatably mounted on said pintle valve means in eccentric relationship relative to said cylindrical chamber,
- a plurality of circumferentially spaced and hollow piston means mounted on said rotor to extend radially outwardly therefrom,
- a cylinder means mounted on an end of each of said piston means for relative reciprocal movement therebetween and disposed in sliding bearing contact internally of said cylindrical chamber,
- first passage means, having said shaft disposed therein constituting a single and substantially unrestricted passage defined in said housing and extending from said inlet means to said single inlet chamber, and
- second passage means defined in said housing for communicating an outlet side of said pintle valve means with said outlet means.
Dependencies are inferred from the claim text.