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:
Sep. 16, 2008
Filed:
Mar. 28, 2006
Toshimichi Matsusaki, Takahagi, JP;
Tatsuya Ohtaka, Hitachi, JP;
Kouichi Sato, Hitachi, JP;
Yukio Ikeda, Hitachi, JP;
Toshimichi Matsusaki, Takahagi, JP;
Tatsuya Ohtaka, Hitachi, JP;
Kouichi Sato, Hitachi, JP;
Yukio Ikeda, Hitachi, JP;
Hitachi Cable, Ltd., Tokyo, JP;
Abstract
A torque sensoris provided with two shafts(input shaftand output shaft) which constitute a shaft member, which is a torque detection object, an elastic memberwhich connects the shaftsandcoaxially, and a torsion angle of the elastic memberis detected as a torque which affects on the shaft member. The torque sensoris provided with a hard magnetic memberwhich generates a magnetic flux therearound, a pair of first soft magnetic memberswhich constitute a first magnetic circuit Htogether with the hard magnetic memberto change a reluctance by torsion of the elastic member, a pair of second soft magnetic memberswhich constitute a second magnetic circuit Htogether with the hard magnetic memberto keep the reluctance constant, and a flux detection meanswhich detects a flux density of the second magnetic circuit Hthat varies in accordance with a torsion angle of the elastic member