The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 30, 2003
Filed:
May. 23, 2002
Matsushita Electric Industrial Co., Ltd., Kadoma, JP;
Abstract
A linear compressor includes a cylinder supported in a hermetic vessel by a support mechanism. A piston is supported concentrically with the cylinder such that the piston can move in an axial direction of the cylinder. A compression chamber is formed between the cylinder and the piston. A linear motor portion has a moving member connected to the piston through a holding member. A stator is fixed to the cylinder to form a magnetic path between the stator and the moving member. The linear motor portion generates thrust for moving the piston in the axial direction. A sensor detects a displacement of the axial length center of the moving member and a DC bias current is fed to the linear motor to align the axial length of the moving member and the axial length of the stator with each other at the time of operation.