Patent ID: 8419389

Claim:
A reciprocating compressor, comprising; a movable member including a piston; a cylinder; a stationary member provided in the cylinder and including a motor for reciprocating the piston; one or a plurality of springs providing a motive power to drive the movable member to a bottom dead center from a top dead center, one part of which being fixed to the movable member and the other part of which being fixed to the stationary member; and a shell encompassing the movable member, stationary member, and springs, the motor comprising: an inner stator formed by insulatingly stacking core blocks in a circumferential direction; an outer stator having a coil winding body, and consisting of a plurality of blocks encompassing the inner stator at a predetermined interval, each block comprising a coil formed in the circumferential direction and an upper pole and a lower pole spaced apart by a pole tip; and lengths of the upper pole and lower pole of each adjacent block not being the same; and one or a plurality of permanent magnets maintaining a gap between the inner stator and the outer stator, and linearly reciprocating by a mutual electromagnetic force.