Patent ID: 7172395

Claim:
A scroll type fluid machine comprising a fixed scroll ( 40 ), an orbiting scroll ( 50 ), a rotating shaft ( 20 ) which engages the orbiting scroll ( 50 ), and a self-rotation preventing mechanism ( 39 ) for preventing the orbiting scroll ( 50 ) from rotating, wherein: the fixed scroll ( 40 ) comprises a first stationary-side member ( 41 ) provided with a first stationary-side wrap ( 42 ), and a second stationary-side member ( 46 ) provided with a second stationary-side wrap ( 47 ), the orbiting scroll ( 50 ) comprises: a first flat-plate part ( 51 ) having a back surface on which is provided an engaging part ( 64 ) which engages the rotating shaft ( 20 ), and a front surface which comes into sliding contact with the first stationary-side wrap ( 42 ); a first movable-side wrap ( 53 ) which forms a first fluid chamber ( 71 ) when engaged with the first stationary-side wrap ( 42 ); a second flat-plate part ( 52 ) which faces the first flat-plate part ( 51 ) across the first movable-side wrap ( 53 ) and which has a rear surface coming into sliding contact with the first stationary-side wrap ( 42 ) and a front surface coming into sliding contact with the second stationary-side wrap ( 47 ); and a second movable-side wrap ( 54 ) which forms a second fluid chamber ( 72 ) when engaged with the second stationary-side wrap ( 47 ), and the second stationary-side member ( 46 ) is provided with a third flat-plate part ( 49 ) which faces the second flat-plate part ( 52 ) across the second movable-side wrap ( 54 ) and which comes into sliding contact with the second movable-side wrap ( 54 ).