Patent ID: 7377759
Filing Date: 2008-05-27
Classification: F01C,F04C

Abstract:
1. A scroll fluid machine comprising: a housing; a driving shaft having an eccentric axial portion; a fixed scroll fixed to the housing; an orbiting scroll rotatably secured around the eccentric axial portion of the driving shaft, the orbiting scroll engaging with the fixed scroll to form a compression chamber between the fixed and orbiting scrolls; and a self-rotation-preventing device that allows the orbiting scroll to revolve while the device prevents the orbiting scroll to rotate on its own axis, said self-rotation-preventing device comprising a pair of holders one of which is fixed in the housing, the other being fixed in an orbiting side, each of the holders comprising a bearing and a shaft rotatably supported in the bearing, the shaft being connected to the other shaft to constitute a pin crank, the holder of the orbiting side comprising a plurality of ears and a holding plate that holds the bearing in the holder, two of the ears being disposed outside a first circle which passes through a center of the holder around a center of the orbiting scroll, one of the ears being disposed inside the first circle.