Patent ID: 9243635
Filing Date: 2016-01-26
CPC Classification: F04C,F05C

Claim Text:
1. A compressor, comprising: a cylinder having a compression chamber and a blade housing in communication with the compression chamber; a first end plate member and a second end plate member disposed on axial ends of the cylinder; and a piston disposed in the compression chamber and inside the blade housing, the piston including an annular roller disposed in the compression chamber and a blade extending from an outer circumference surface of the roller and disposed in the blade housing so as to be movable forward and backward; a resin layer including a stack of three or more layers being formed on at least a portion of at least one of a hardness of a layer most distant from a base in the resin layer being smaller than a hardness of a layer closest to the base in the resin layer, and a difference in hardness between two adjacent layers in the resin layer being smaller than a difference in hardness between the layer most distant from the base and the layer closest to the base.