Patent ID: 6821099
Filing Date: 2004-11-23
Classification: F04C,F05C

Abstract:
A rotary pump, comprising:a stator housing having an oblong inner surface; first and second side plates located opposite one another at axial ends of the stator housing, the rotor and the first and second side plates forming a hollow oblong cylinder; a rotor disposed in the hollow oblong cylinder formed by the stator housing and the first and second side plates, the rotor having a substantially circular outer surface within which a plurality of vane slots are defined; a first crescent shaped chamber being defined between a first half of the oblong inner surface of the stator housing and the outer surface of the rotor; a second crescent shaped chamber being defined between a second half of the oblong inner surface of the stator housing, diametrically opposite the first half, and the outer surface of the rotor; a plurality of sliding vanes, each within a corresponding one of the plurality of vane slots; a first inlet port and a first outlet port each disposed through the first side plate and into the first crescent shaped chamber; and a second inlet port and a second outlet port each disposed through the first side plate and into the second crescent shaped chamber.