Hollow swash plate compressor piston with bores

摘要

A unilateral-headed swash plate type compressor, in which a body 19a of a piston 19 in sliding contact with the inner peripheral surface of a cylinder bore 1a is formed with a cavity 19a for realizing a reduced weight and also formed with an annular groove 42 fitted with a piston ring 41 in sliding contact with the inner peripheral surface of the cylinder bore 1a, is disclosed. The body 19c of the piston 19 includes at least a first hole 46 and at least a second hole 48 open to the inner peripheral surface of the cylinder bore 1a and communicating with the crank chamber 8 through the cavity 19a.