Patent ID: 9506460
Filing Date: 2016-11-29
CPC Classification: F04B

Claim Text:
1. A linear compressor, comprising: a cylinder assembly defining a chamber; a piston slidably received within the chamber of the cylinder assembly; a driving coil; an inner back iron assembly positioned in the driving coil, the inner back iron assembly having an outer surface; a magnet mounted to the inner back iron assembly at the outer surface of the inner back iron assembly such that the magnet faces the driving coil; a machined spring positioned in the inner back iron assembly, the machined spring extending between the inner back iron assembly and the cylinder assembly in order to couple the inner back iron assembly to the cylinder assembly; a piston flex mount positioned in the machined spring, the piston flex mount coupled to the inner back iron assembly; and a compliant coupling extending between the piston flex mount and the piston, the compliant coupling being compliant along a radial direction that is perpendicular to an axial direction, wherein a magnetic field of the driving coil engages the magnet in order to move the inner back iron assembly along the axial direction in the driving coil and the piston within the chamber of the cylinder assembly during operation of the driving coil, wherein the inner back iron assembly extends between a first end portion and second end portion, the machined spring mounted to the inner back iron assembly at the first end portion of the inner back iron assembly, the machined spring extending through the inner back iron assembly from the first end portion of the inner back iron assembly to the cylinder assembly, and wherein the inner back iron assembly comprises an outer cylinder and an inner sleeve positioned within the outer cylinder, the outer cylinder comprising a plurality of ferromagnetic laminations circumferentially distributed and mounted to one another, the inner sleeve extending through the outer cylinder from the second end portion of the inner back iron assembly to the first end portion of the inner back iron assembly, the machined spring fixed to the inner sleeve at the first end portion of the inner back iron assembly.