Patent ID: 7908962

Claim:
A compressor, comprising: a cylinder block that compresses, discharges, and draws refrigerant; a piston that reciprocates inside of the cylinder block; a crank shaft that rotates as the crank shaft receives a torque from an electric driving part, the crank shaft having an eccentric part at an end thereof; a connecting rod having one end coupled to the piston and another end coupled to the eccentric part at the crank shaft, that converts a rotating movement of the crank shaft into a linear movement that moves the piston; and a supplementary torque providing part, wherein the connecting rod includes a first connecting part connected to the piston and a second connecting part connected to the eccentric part at the crank shaft, and wherein the supplementary torque providing part includes a first elastic member provided between the first connecting part and the second connecting part, and having opposite ends connected to the first connecting part and the second connecting part, respectively, to form an outer circumferential surface, and a second elastic member fitted inside of the first elastic member, wherein the first and second elastic members are bent in compression and re-expansion of the refrigerant.