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:
Oct. 11, 1988
Filed:
Sep. 25, 1987
Applicant:
Inventors:
Hirofumi Takabatashi, Mishima, JP;
Hideya Sakurai, Mishima, JP;
Assignee:
Sumitomo Special Metal Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ;
U.S. Cl.
CPC ...
335306 ; 324318 ;
Abstract
A magnetic field generating device for the NMR-CT comprises a pair of opposing permanent magnet segments magnetically coupled by a yoke which define therebetween an air gap where a magnetic field is created. Each segment has a pole piece attached to its gap-facing surface. Each segment is composed of a ferrite magnet and a rare earth magnet, one of the two magnets being disposed in the central portion of the segment and the other disposed around the one magnet. The thickness of the ferrite magnet in the direction of attaching it to the yoke is larger than that of the rare earth magnet.