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. 16, 2008
Filed:
Mar. 31, 2005
John Robert Christian Friberg, Nacka, SE;
John Robert Christian Friberg, Nacka, SE;
Atlas Copco Tools AB, Nacka, SE;
Abstract
A method for determining the angular displacement of the output shaft (φ) of an impulse nut runner at tightening a screw joint to a predetermined final torque level (T) by an impulse nut runner having a motor driven impulse unit () with an inertia drive member (), an output shaft () to be coupled to the screw joint to be tightened and an angle sensing device () associated with the drive member () and arranged to deliver signals in response to the rotational movement of the drive member (), wherein the total angular displacement of the output shaft () in relation to a threshold torque level (T) is calculated as a difference between the total angular displacement (φ) of the drive member () as a result of a total number of delivered impulses (N) and the angle of the total number of full revolutions minus one full revolution └ (N−1)·360).