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. 19, 2011
Filed:
Jan. 18, 2007
Manabu Aoki, Ibaraki, JP;
Mitsushi Abe, Ibaraki, JP;
Takeshi Nakayama, Ibaraki, JP;
Masanori Takahashi, Ibaraki, JP;
Manabu Aoki, Ibaraki, JP;
Mitsushi Abe, Ibaraki, JP;
Takeshi Nakayama, Ibaraki, JP;
Masanori Takahashi, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The electromagnet apparatuses generate a homogeneous magnetic field in a homogeneous magnetic field region by a pair of superconductive main coils for facing to each other; a pair of superconductive shielding coils for facing to each other and passing a current in a direction reverse to that of the main coils; and a pair of first ferromagnetic members for facing to each other, and the apparatuses further include a pair of second ferromagnetic members for facing to each other and be disposed in contact with or adjacent to an opposite side of the region side of the first ferromagnetic members, wherein the region is interposed between the main coils, between the shielding coils, between the first members whose outer periphery is a circle, and between the second members whose outer periphery is a circle whose diameter is larger than that of the circle of the first members.