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:
Jun. 21, 2005
Filed:
Dec. 04, 2001
Shigeru Kakugawa, Hitachi, JP;
Katsunori Azuma, Hitachi, JP;
Tsuyoshi Wakuda, Hitachi, JP;
Yoshihide Wadayama, Hitachiota, JP;
Hirotaka Takeshima, Ryugasaki, JP;
Kenji Sakakibara, Kashiwa, JP;
Takeshi Yatsuo, Kashiwa, JP;
Takao Honmei, Hitachinaka, JP;
Shigeru Kakugawa, Hitachi, JP;
Katsunori Azuma, Hitachi, JP;
Tsuyoshi Wakuda, Hitachi, JP;
Yoshihide Wadayama, Hitachiota, JP;
Hirotaka Takeshima, Ryugasaki, JP;
Kenji Sakakibara, Kashiwa, JP;
Takeshi Yatsuo, Kashiwa, JP;
Takao Honmei, Hitachinaka, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Medical Corporation, Tokyo, JP;
Abstract
A magnet device provided with a shield current carrying means in which two sets of magneto-static field generating sources for generating magnetic fields directed towards a first direction are disposed facing each other across a finite region and at least one set of the magneto-static field generating sources are disclosed on at least two almost concentric circles. A first plane includes a first axis, a second axis and a first point. The first point is a point of insertion between the first axis parallel to the first direction and passing almost through the center of the shield current carrying means. The second axis crosses at right angles to the first axis and is spaced almost equal distance from the two sets of the generating sources. The alternately arranged positive and negative current carrying directions of the shield current carrying means are set in the order of increasing value of θn.