Patent ID: 7574954
Filing Date: 2009-08-18
Classification: F04B

Abstract:
1. A compressor, comprising: a piston mounted to reciprocate inside of a cylinder to draw a working fluid into a compression chamber within the cylinder, compress, and discharge the working fluid to an outside of the cylinder; a connecting rod connected between a crank shaft and the piston that converts a rotating movement of the crank shaft into a reciprocating movement of the piston; a piston pin attached to one end of the connecting rod, wherein a clearance is provided between an inside surface of die one end of the connecting rod and an outside surface of the piston pin; and at least one oil passage configured to connect the clearance with a piston chamber, wherein the at least one oil passage is configured to allow lubricating oil to escape from the clearance into the piston chamber, and wherein the at least one oil passage comprises a groove provided extending along an inside surface of the piston.