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:
Apr. 02, 2019
Filed:
Apr. 29, 2014
Applicant:
Hilti Aktiengesellschaft, Schaan, LI;
Inventors:
Corinna Achleitner, Bludenz, AT;
Guenter Domani, Weissenberg, DE;
Mark Winkler, Hohenems, AT;
Carsten Peters, Sax, CH;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B 51/02 (2006.01); B21H 3/10 (2006.01); E21B 10/44 (2006.01); B23P 15/32 (2006.01);
U.S. Cl.
CPC ...
B23B 51/02 (2013.01); B21H 3/10 (2013.01); B23P 15/32 (2013.01); E21B 10/445 (2013.01); B23B 2251/406 (2013.01);
Abstract
The twist drill () has a drilling head (), a continuous two-flute, three-flute to six-flute helix () and an insertion end () that are arranged consecutively on a drill axis (). The helix () has a radial outer dimension () that varies periodically two, three to six times per revolution around the drill axis (). The invention also relates to a production method for such a drill.