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:
Jul. 31, 1979
Filed:
May. 11, 1977
Applicant:
Inventor:
Peter J Gill, Wolverhampton, GB;
Assignee:
G.K.N. Fasteners Limited, West Midlands, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B25B / ;
U.S. Cl.
CPC ...
81 5 / ;
Abstract
Method and apparatus for tightening a nut and bolt assembly to ensure that the bolt shank is tensioned correctly using a wrench having two relatively movable detector parts carried by the body of the wrench, one part being a cylindrical outer casing which engages the abutment surface non-rotatably, the other part being a stem extending axially from the body and having its outer end engaging the body of the nut and its inner end connected to a holder for a microswitch arranged to cooperate with an actuating member fixed to said outer casing, said microswitch being in an electrical circuit which controls power to the wrench and/or a visible or audible signal.