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:
Jan. 25, 1994
Filed:
Apr. 14, 1992
Hiroyuki Aoki, Yokohama, JP;
Munekatsu Shimada, Yokohama, JP;
Itaru Shibata, Yokohama, JP;
Mikiya Shinohara, Yokohama, JP;
Masashi Mizuno, Aichi, JP;
Shinichiro Yahagi, Oobu, JP;
Masaru Nagata, Nagoya, JP;
Nobuyuki Matsui, Chita, JP;
Shigeo Hanashima, Tokai, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Daido Steel Co., Ltd., Nagoya, JP;
Abstract
To obtain stable linear torque-output characteristics over a wide torque range in a magnetostrictive torque detecting apparatus having a shaft to be measured, an exciting coil for magnetically exciting the shaft, and a detecting coil for detecting magnetostrictive components generated in the shaft distorted by a torque, the shaft is particularly composed of a substrate shaft portion made of a high yield point material and a shape anisotropic layer portion made of a high magnetostrictive material metallographically welded on an outer surface of the substrate shaft. The welded shape anisotropic layer portion is formed with two symmetrical groups of concave/convex portions each arranged at regular angular intervals on the outer circumferential surface thereof at an inclination angle with respect to the axial direction of the shaft.