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:
Nov. 24, 2015
Filed:
Oct. 01, 2012
Illinois Tool Works Inc., Glenview, IL (US);
Tiejun Ma, Tecumseh, CA;
Romeo N. Cossette, Windsor, CA;
ILLINOIS TOOL WORKS INC., Glenview, IL (US);
Abstract
The welding contact tips presented herein include contoured inner bores that include a front inner bore section and a back inner bore section. In certain embodiments, the front inner bore section is approximately 0.3-0.6 inches long and includes an inner wall having a substantially constant inner diameter. The back inner bore section is configured to conform to the specific welding wire used with the welding contact tip. In particular, the back inner bore section includes an inner wall having an inner diameter that is substantially larger at an axial end of the welding contact tip than at an axial transition location where the front and back inner bore sections abut. As such, the welding contact area between the welding contact tip and the welding wire is enhanced in the front inner bore section, especially when the welding wire twists inside the contact tip and the welding torch.