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:
Apr. 20, 2010
Filed:
Jul. 06, 2004
Carl-gustaf Carlin, Tyresö, SE;
BO Lennart Hellmark, Stockholm, SE;
Carl-Gustaf Carlin, Tyresö, SE;
Bo Lennart Hellmark, Stockholm, SE;
Atlas Copco Tools AB, Nacka, SE;
Abstract
A method for quality assurance of screw joint tightening results when tightening a screw joint to a needed pretension condition (F) by means of a torque delivering power tool, wherein one or more simulation procedures of a screw joint tightening process via a specific algorithm aiming at the needed pretension condition (F) by using programmed data relating to the screw joint geometry, expected frictional conditions, power tool characteristics, a tightening strategy and suitable tightening parameter values, thereby arriving at a simulated pretension condition (F) which is compared to the resultant pretension condition (F) of a practically performed tightening process performed via the same specific algorithm, and evaluating the outcome of the comparison for quality acceptance or refusal.