Patent ID: 7722340
Filing Date: 2010-05-25
Classification: F01C,F04C

Abstract:
1. A rotary type fluid machine comprising: a cylinder having a ring-shaped cylinder chamber; a ring-shaped piston disposed eccentrically relative to the cylinder in the cylinder chamber to divide the cylinder chamber into an external side cylinder chamber and an internal side cylinder chamber; and a blade arranged to pass through the ring-shaped piston to divide the external side cylinder chamber into a high pressure chamber and a low pressure chamber and to divide the internal side cylinder chamber into a high pressure chamber and a low pressure chamber, the cylinder and the ring-shaped piston being configured to move relatively in an eccentric rotation motion, and the blade is a single body configured to be advanceable/retractable in a longitudinal direction thereof such that the rotary fluid machine is changeable between a first state and a second state; in the first state the blade divides both the external side cylinder chamber into the high pressure chamber and the low pressure chamber and the internal side cylinder chamber into the high pressure chamber and the low pressure chamber, in the second state at least one of the external side cylinder chamber and the internal side cylinder chamber is an undivided single space during one rotational movement.