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:
Nov. 09, 2004
Filed:
Sep. 20, 2001
Applicant:
Inventors:
Ayumu Morita, Hitachi, JP;
Yasuaki Suzuki, Hitachi, JP;
Masato Yabu, Hitachi, JP;
Tooru Tanimizu, Hitachi, JP;
Yozo Shibata, Hitachi, JP;
Takashi Kadowaki, Yonago, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F 7/08 ;
U.S. Cl.
CPC ...
H01F 7/08 ;
Abstract
An electromagnet includes a coil, a movable iron core adapted to move on the center axis of the coil, and a stationary iron core provided so as to cover the upper and lower surfaces and the outer peripheral surface of the coil. A permanent magnet is arranged in a gap surrounded by the movable iron core and the stationary core.