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US 10,047,606 B2Granted
Vane pump
AssigneeHamilton Sundstrand Corporation
InventorsJoseph Wetch, Weishun Ni, Edward W. Goy
Life of this patent
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Abstract
A vane pump is disclosed that includes a plurality of vanes and radial slots configured to provide a gap between the vane and the radial slot such that the vane has a different angular position relative to the direction of rotation in a radially extended position compared to an angular position in a radially-retracted position. The different angular positions provide different orientation of the arcuate surface of the vane tip portion with respect to the cam body inner surface, thus providing different fluid stop points on the vane tip portion arcuate surface.
Claims14
A vane pump, comprising
- a housing including an inlet port and an outlet port;
- a cam block having a continuous inner surface including a pump arc and a seal arc;
- a rotor configured to rotate within the cam block, said rotor including a plurality of radial slots;
- a plurality of radially-extendable vanes that radially extend from the slots as they rotate past the cam block pump arc and retract as they rotate past the cam block seal arc, each of the vanes comprising a radial portion in one of the radial slots and a tip portion extending transverse to the radial portion in a direction of rotation of the rotor, said tip portion including an arcuate surface that engages with the cam block inner surface to provide a fluid seal point along the arcuate surface;
- wherein the radial slots have a leading edge along a plane coincident with an axis of rotation of the rotor and a trailing edge at an angle with respect to the leading edge, and each of the plurality of vanes and radial slots are configured to provide a gap between the vane and the radial slot such that the vane has a different angular position relative to the direction of rotation in a radially extended position compared to a radially-retracted position, thereby providing different fluid stop points on the vane tip portion arcuate surface.
2 more elements
Dependencies are inferred from the claim text.