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:
Apr. 01, 2003
Filed:
Jul. 25, 2001
Applicant:
Inventor:
Masaaki Tanabe, Tokyo, JP;
Assignee:
Nitto Kohki Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04B 1/704 ;
U.S. Cl.
CPC ...
F04B 1/704 ;
Abstract
There is provided a compressor having two compression portions arranged in parallel. A compression chamber is formed into an air-tight chamber surrounded by a head of a piston, a cylinder, and a head cover. A discharge chamber is provided to the periphery of each cylinder, and these discharge chambers communicate with each other by a through hole. Two field cores of each electromagnet for driving each piston are formed in the integral structure, and a half wave of an alternating electric current is supplied to each coil wound around these coils in such a manner that the excitation directions of the respective field cores are opposed from each other.