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:
Dec. 28, 2010
Filed:
Jun. 13, 2008
Applicants:
Colin Parrish, Derby, GB;
James Roberts, Derby, GB;
Leighton Tipton, Derby, GB;
Inventors:
Assignee:
Rolls-Royce plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L 3/00 (2006.01); G01L 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A rotating shaft has a torsional oscillation frequency that is dependent on the stiffness of the shaft. The torsional oscillation frequency and the stiffness are dependent upon the operating conditions of the shaft. The torque of the rotating shaft is determined by measuring the torsional oscillation frequency of the rotating shaft; measuring the twist induced in the rotating shaft by the torque; and using the measured value of the torsional oscillation frequency and the measured value of the induced twist to determine the torque induced in the shaft.