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. 22, 2002
Filed:
Apr. 23, 1999
Leonid Bogdanov, Troy, MI (US);
TRW Inc., Lyndhurst, OH (US);
Abstract
The present invention is directed to a torque sensing apparatus ( ) for sensing torque applied to an elongated shaft ( ) having a longitudinal axis ( ). An elongated magnetoelastic element ( ) is connected about a portion of the shaft ( ). The magnetoelastic element ( ) provides a magnetic field in response to a torque (T) applied to the shaft ( ). A magnetic member ( ) is positioned adjacent the magnetoelastic element ( ). An alternating power source ( ) drives the magnetic member ( ) into magnetic saturation. The magnetic member ( ) has a saturation condition responsive to the magnetic field of the magnetoelastic element ( ). A detector circuit ( ) detects the saturation condition of the magnetic member. The detector circuit ( ) provides a signal indicative of the applied torque in response to the saturation condition of the magnetic member ( ).