Patent ID: 6457959
Filing Date: 2002-10-01
Classification: F01C

Abstract:
A scroll compressor for compressing gas comprising:a housing having an annular groove that includes a pair of walls facing each other; a fixed scroll formed in the housing; a drive shaft rotatably supported in the housing; a movable scroll accommodated in the housing to mate with the fixed scroll; a crank mechanism located between the drive shaft and the movable scroll for driving the movable scroll in accordance with the rotation of the drive shaft: a projection extending radially from the movable scroll along a plane perpendicular to the axis of the drive shaft, wherein the projection is located in the annular groove and slides along the walls of the annular groove, wherein the projection has a thickness measured in the axial direction of the drive shaft, and wherein the distance between the groove walls is greater than the thickness of the projection by a predetermined value; and a restriction mechanism for inhibiting rotation of the movable scroll with respect to the axis of the movable scroll and for permitting orbital movement of the movable scroll, the restriction mechanism includes a pin, the pin has ends, the housing further having a support hole formed in one of the groove walls to support the pin, and a guide hole formed in the projection to correspond to the support hole to loosely fit the pin, the guide hole has an inner diameter greater than that of the support hole so that the pin orbits within the guide hole by contacting an inner periphery surface of the guide hole while remaining parallel to the drive shaft, wherein the support hole is formed in one of the groove walls, and the guide hole is a through hole formed in the projection to correspond to the support hole, wherein one end of the pin is supported by the support hole, undo wherein the other end of the pin is loosely fitted in the glide hole.