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. 15, 1981
Filed:
Jan. 10, 1980
Siavash Eshghy, Pittsburgh, PA (US);
Rockwell International Corporation, Pittsburgh, PA (US);
Abstract
A fastening tool, which is preferably portable, incorporates torque and angle sensors connected to an analog calculating circuit which determines, while tightening below the yield point of any component of the joint being tightened, a final shut off parameter which varies from joint to joint while tightening seriatim a plurality of substantially identical joints. The logarithimic rate method is used to determine the final shut off parameter. In accordance with one embodiment of the invention, a simplification occurs by the measurement of an angle interval occurring between two predetermined torque values. In accordance with another embodiment of the invention, a simplification occurs by measuring the torque value existing at a predetermined angle interval beyond a first predetermined torque level.