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:
Oct. 23, 2012
Filed:
Nov. 03, 2008
Hugh Taylor, Great Eversden, GB;
Hugh Taylor, Great Eversden, GB;
Transmission Systems Limited, St. Clement, Jersey, GB;
Abstract
A method of making a gun barrel having a breech end and a muzzle end and a bore extending between the two ends comprises applying to the outer surface of the bore a plurality of swaging dies (), each of which carries an upstanding helical land (). The dies are pressed simultaneously against the external surface of the gun barrel such that each land forms a helical recess () in the external surface and crystalline deformation to the material of the barrel wall immediately below the external helical recess. The distortion of the external surface results simultaneously in the creation of a plurality of smooth helical ridges () on the surface of the bore.