Compressor having capacity-controlling mechanism with abrasion-free cylinder

摘要

A compressor having a capacity-controlling mechanism is provided, by which the inner-peripheral surface of a blind opening provided in a piston is subjected to abrasion due to sliding and rotating motions of a coil spring in the piston. In the capacity-controlling mechanism, the coil spring is covered by a cover made of abrasion resistant material and the covered coil spring is arranged in the blind opening, or a head of the coil spring is engaged to an inner surface of the blind opening.