Patent ID: 6497557
Filing Date: 2002-12-24
Classification: F01C,F04C

Abstract:
A pump comprising:a rotor housing having a pumping chamber; a rotor in said pumping chamber, said rotor having a plurality of radially disposed slots; a plurality of sliding vanes disposed in said slots, said sliding vanes configured to extend to follow an inner wall of said pumping chamber; said pumping chamber having at least two internal inlet ports and at least two internal discharge ports, said internal inlet ports, internal discharge ports, rotor, and vanes all configured to pump fluid from said internal inlet ports to said internal discharge ports as said rotor rotates within said pumping chamber; a discharge housing fixedly attached to said rotor housing, said discharge housing being in communication with said internal discharge ports and providing at least two external discharge ports, said discharge housing having fluid paths passing all the fluid from one of said internal discharge ports to one of said external discharge ports such that all the fluid exiting said pumping chamber through said one of said internal discharge ports passes through said one of said external discharge ports, said discharge housing including additional fluid paths passing all of said fluid from a second of said internal discharge ports through one of said first external discharge ports and a second of said external discharge ports.