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. 26, 1993
Filed:
Jun. 26, 1991
Katsuyuki Miyake, Shiga, JP;
Tomoyoshi Sawada, Tsuyama, JP;
Nippon Densan Corporation, Kyoto, JP;
Abstract
A torque transducer including: a ferromagneto-stricting device provided for a rotational shaft; a magnetic field supply device for supplying a magnetic field to the ferromagneto-stricting device; a sensing device for sensing the change in the magnetic permeability which has taken place due to torque acting on the rotational shaft; a fixed housing for rotatably supporting the rotational shaft via a bearing unit; and an electromagnetic shielding device for surrounding the magnetic field supply device and the sensing device to electromagnetically shield them. The magnetic field supply device comprises an exciting coil, while the sensing device comprises a sensing coil. The electromagnetic shielding device is supported by the fixed housing via an elastic holding member. A seal member is disposed outside the bearing unit. The fixed housing and the electromagnetic shielding device are electrically earthed.