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:
Aug. 15, 2023
Filed:
Nov. 28, 2017
Applicant:
Hilti Aktiengesellschaft, Schaan, LI;
Inventors:
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/44 (2006.01); B23K 26/302 (2014.01); B23D 65/00 (2006.01); B21C 37/12 (2006.01); E21B 17/04 (2006.01); B23K 101/00 (2006.01);
U.S. Cl.
CPC ...
B23K 26/302 (2015.10); B21C 37/122 (2013.01); B23D 65/00 (2013.01); E21B 10/44 (2013.01); E21B 17/041 (2020.05); B23K 2101/002 (2018.08);
Abstract
A method for producing a drill shaft for a wet drill bit includes forming N, where N≥1, strip materials into a tubular body where the tubular body is integrally joined at strip edges of the strip materials by N connection welds. At least one strip material of the strip materials is provided with at least one recess before the integral joining of the strip edges.