Patent ID: 6132196
Filing Date: 2000-10-17
Classification: F01C

Abstract:
An apparatus capable for use as a pump or motor, said apparatus comprising:a housing having sealed ends and provided with a cavity between said ends, said housing further including first and second ports both allowing fluid communication between the interior and exterior of said housing;a rotor having a substantially hollow rotor body supported by said housing for rotation within said cavity about a rotation axis extending parallel to and offset from a longitudinal axis of said cavity, said rotor body having opposite first and second ends which include respective portions of reduced diameter with respect to an intermediate portion of said rotor body;a plurality of slots formed in said rotor body extending between said opposite first and second ends and terminating in and inboard of said reduced diameter portions; and,a plurality of vanes, individual ones of which are slidably retained in separate slots for movement radially of said rotation axis;said vanes, rotor and housing juxtaposed so that a substantially sealed chamber is formed between adjacent vanes, an inner circumferential surface of said housing and said rotor, and wherein said first and second ports are disposed in different ones of said chambers.