Patent ID: 6498410
Filing Date: 2002-12-24
Classification: F04D,F16C,H02K

Abstract:
A pressure generating apparatus for generating a predetermined pressure, the apparatus comprising:a motor, wherein the motor includes a rotary shaft having a distal end and a basal end, and a non-contact bearing for supporting the rotary shaft; a vane rotated integrally with the rotary shaft; an intake chamber located in the distal end of the rotary shaft; a pressure balancing chamber located at the basal end of the rotary shaft; and a passage connecting the intake and pressure balancing chambers, the passage and the pressure balancing chamber isolated from a fluid circuit in which a main stream of air flows, the passage lowering a pressure difference between the intake chamber and the pressure balancing chamber to prevent an attraction force that could cause an axial movement of the rotary shaft toward the intake chamber.