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:
Mar. 30, 1993
Filed:
Jul. 22, 1991
Stephen M Heiman, Exton, PA (US);
Michael J Delzingaro, Glenside, PA (US);
Liberty Technology Center, Inc., Conshohocken, PA (US);
Abstract
A system for determining torque generated by a motor actuated operator driving a partial turn valve including a torque ring replacing the cover of the operator housing, a frictional shaft coupling member coupling the inner circumferential surface of the drive sleeve within the operator housing to the central shaft of a torque plug projecting from the operator through the torque ring. Two or more stops are provided projecting from the torque ring on either side of the central shaft. A cross member is provided extending radially outwardly from the central shaft of the torque plug to contact each of the stops when the operator is driven. A sensor, preferably an array of strain gauges mounted to the central shaft, generates a signal proportional to the torque applied by the operator to the operator housing through the frictional shaft coupling and the torque plug. The system can be used to calibrate torque switches typically associated with the motor actuator of the operator or corrolate another parameter of the motor actuated operator, such as an actuator spring pack force or displacement which varies with torque load, so as to measure torque indirectly from such parameter.