Patent ID: 7114931

Claim:
Rotary pump comprising: a. a stator housing having a first side surface and a second side surface, the stator housing having an oblong inner surface axially extending between the first side surface and the second side surface; b. a rotor disposed in the oblong inner surface, wherein the rotor has a substantially circular outer surface; c. a vane slot in the substantially circular outer surface of the rotor; d. a vane slidably moveable in the vane slot; e. a chamber defined between a portion of the oblong inner surface of the stator and the outer surface of the rotor wherein the chamber further includes a first chamber and a second chamber, wherein the second chamber is diametrically opposed of the first chamber; f. an inlet port extending in the first side surface and in communication with the chamber wherein the inlet port further includes a first inlet port and a second inlet port, wherein the first inlet port is in communication with the first chamber and the second inlet port is in communication with the second chamber; g. an outlet port extending in the first side surface and in communication with the chamber wherein the outlet port further comprises a first outlet port and a second outlet port, wherein the first outlet port is in communication with the first chamber and the second outlet port is in communication with the second chamber; and h. a first side plate coupled to the first side surface of the stator housing, wherein the first inlet port and the first outlet port extend through the first side plate into the first chamber, and wherein the second inlet port and the second outlet port extend through the first side plate into the second chamber.