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:
Feb. 24, 2009
Filed:
May. 29, 2003
Orestes J. Varonis, North Canton, OH (US);
Orestes J. Varonis, North Canton, OH (US);
The Timken Company, Canton, OH (US);
Abstract
The present disclosure provides a device for sensing a torque applied through a shaft (). The device includes a shaft () and a bearing () attached to the shaft (). The bearing () includes an inner race (), an outer race () and a plurality of rolling elements (). A magnetoelastic ring () is press-fit onto the inner race (). An eddy current or a magnetic field sensor () is placed in close proximity to the magnetoelastic ring (). In the case of an eddy current sensor (), the magnetoelastic ring () is not magnetized. In the case of a magnetic field sensor (), the magnetoelastic ring () is magnetically circularly polarized. In either case, the chosen sensor () senses the induced changes of the magnetoelastic ring () characteristics and its associated electronics provides a measure of the applied torque.