Patent ID: 7175401

Claim:
A variable capacity rotary compressor, comprising: upper and lower compression chambers having different interior capacities thereof; a rotating shaft passing through the upper and lower compression chambers, with a locking hole being provided at a predetermined portion of the rotating shaft; upper and lower eccentric cams provided on the rotating shaft; upper and lower eccentric bushes fitted over the upper and lower eccentric cams, respectively; a slot provided at a predetermined position between the upper and lower eccentric bushes; a locking pin inserted into the locking hole to project from the rotating shaft, the locking pin operating to change a position of the upper or lower eccentric bush to a maximum eccentric position, in cooperation with the slot; and a surface-treated part provided around the locking hole to prevent the locking hole from being deformed or worn out when the locking pin collides with first and second ends of the slot.