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:
May. 20, 2025
Filed:
Feb. 28, 2023
Nsk Ltd., Tokyo, JP;
Proterial, Ltd., Tokyo, JP;
Masahiro Kobayashi, Fukuroi, JP;
Kota Fukuda, Fukuroi, JP;
Hisayoshi Fukui, Fukuroi, JP;
Takahiro Odera, Fukuroi, JP;
Teruyuki Nakamura, Koto-ku, JP;
Naoki Futakuchi, Koto-ku, JP;
Ken Okuyama, Koto-ku, JP;
NSK LTD., Tokyo, JP;
PROTERIAL, LTD., Tokyo, JP;
Abstract
A torque measuring device includes: a coil unit having a detection coil configured to change a voltage in response to a change in magnetic permeability of a magnetostrictive effect section of a rotating shaft; a back yoke arranged coaxially around the coil unit; a holder configured to hold the coil unit and the back yoke; and an electronic circuit including the detection coil and configured to generate an output voltage according to a voltage of the detection coil, a clearance in a radial direction is provided between an outer peripheral surface of the coil unit and an inner peripheral surface of the back yoke, and a range of change in the clearance that accompanies temperature change during use is regulated to a range in which a change in the output voltage is linear with respect to the change in the clearance.