Patent ID: 8496453

Claim:
A linear compressor, comprising: a hermetic container configured to be filled with a refrigerant; a linear motor including an inner stator, an outer stator, and a permanent magnet; a piston that is linearly reciprocated by the linear motor; a cylinder that provides a space to compress the refrigerant upon linear reciprocation of the piston; a supporter piston having a connecting portion connected to one end of the piston that contacts the piston at a front surface of the connecting portion, a support portion that extends from the connecting portion so as to be bent and extend rearward from the connecting portion and then further bent to extend in a first direction symmetrically with respect to a center of the supporter piston and a guide portion that extends from the connecting portion in a second direction, which is perpendicular to the first direction; a plurality of front main springs mounted at positions symmetrical with respect to a center of the piston, wherein a rear end of each front main spring is supported by a front surface of the support portion of the supporter piston; a single rear main spring, a front end of the rear main spring is supported by a rear surface of the connecting portion of the supporter piston; and at least one additional mass member selectively mounted to the guide portion of the supporter piston.