Patent ID: 7192261

Claim:
A scroll fluid machine comprising: a drive shaft having an eccentric axial portion at one end; a stationary scroll comprising a stationary end plate having a stationary wrap; an orbiting scroll comprising an orbiting end plate having an orbiting wrap, the orbiting scroll being rotatably mounted around the eccentric axial portion of the drive shaft, the orbiting scroll being eccentrically revolved with respect to the stationary scroll by the drive shaft so that fluid in a sealed chamber between the stationary and orbiting wraps may be compressed toward a center; a self-rotation preventing mechanism for preventing the orbiting scroll from rotating its own axis, said mechanism being provided near an outer circumference of the stationary scroll; a first permanent magnet provided on the stationary end plate; and a second permanent magnet provided on the orbiting end plate so that the same poles of the first and second permanent magnets are opposite to each other thereby preventing the orbiting scroll to press the stationary scroll excessively.