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:
Sep. 17, 2002
Filed:
May. 03, 2000
Karl Yarnos Eisenhauer, Berowra Heights, AU;
John Baxter, Chatswood, AU;
Bishop Innovation Limited, North Ryde, AU;
Abstract
A torque transducer having a rotating shaft with first and second substantially rigid torque input members connected by a torsionally compliant coupling that enables angular deflection of the first torque input member relative to the second torque input member as a function of the magnitude of the torque in the shaft. First and second grating elements are attached to or integral with first and second torque input members, respectively. The grating elements have surfaces with alternating regions of high and low reflectivity connected by a torsionally compliant coupling. The surfaces are illuminated by a source of electromagnetic radiation (EMR), which generates patterns on one or more arrays of detectors sensitive to the EMR. The disposition of the patterns is a function of torque applied to the shaft, and the output of the one or more arrays can be processed to produce a measure of the torque applied to the shaft.