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. 28, 2015
Filed:
May. 29, 2012
Hiroyuki Muto, Tochigi, JP;
Hiroyuki Muto, Tochigi, JP;
Showa Corporation, Saitama, JP;
Abstract
A relative angle sensing device that senses a relative angle between two rotary shafts is provided with: a hard magnetic body that is provided to one rotary shaft out of the two rotary shafts; a soft magnetic body that is provided to the other rotary shaft out of the two rotary shafts to be arranged in a magnetic field formed by the hard magnetic body, and forms a magnetic circuit together with the hard magnetic body; and a sensing unit that senses a magnetic flux density of the magnetic circuit. The soft magnetic body has a circular ring portion that is formed into a disc having, at an inside thereof, a hole larger than an outer shape of the hard magnetic body, and a protrusion that protrudes from a section of the circular ring portion at a hard magnetic body side in a shaft direction of the one rotary shaft.