Patent ID: 6336336
Filing Date: 2002-01-08
Classification: F04C,F25B

Abstract:
A rotary piston compressor, comprising: a cylinder which forms a cylinder chamber and a bushing housing chamber communicating therewith, a piston disposed in said cylinder chamber, and a rotary bushing disposed in said bushing housing chamber; said piston unitarily having a roller which rotates in said cylinder chamber, and a vane which, together with said roller, divides the interior of said cylinder chamber into a suction chamber and a compression chamber; said vane being extended into said bushing housing chamber; said rotary bushing being separated into a rotary bushing on the compression chamber side and another rotary bushing on the suction chamber side on both sides of said vane; and said rotary bushing on the compression chamber side being disposed so as to move away from said cylinder chamber when a compression chamber pressure not less than a specific pressure, and also to move toward said cylinder chamber when said compression chamber pressure has decreased to not more than a specific pressure, thereby opening and closing a communicating passage for providing communication between said compression chamber and a space on the discharge side outside of said cylinder with the movement of said rotary bushing on the compression chamber side.