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. 26, 2005
Filed:
Jul. 04, 2002
Applicants:
Yohji Okada, Ibaraki, JP;
Hideki Kanebako, Nagano, JP;
Keisuke Abe, Chiba, JP;
Inventors:
Assignee:
Sankyo Seiki Mfg. Co. Ltd., Nagano, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K007/09 ;
U.S. Cl.
CPC ...
Abstract
The flux densities formed by plural electromagnet poles Mto Mwhich are arranged at a predetermined interval in a circumferential direction of a rotary bodyat the same position in an axial direction of the rotary bodyare gradually changed in the circumferential direction of the rotary body. Even if there is a difference between the maximum value of the flux density and the minimum value, the change of the flux densities between the adjacent electromagnet poles is small and smooth. Accordingly satisfactory detective sensitivity and detection results can be obtained.