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. 10, 2001
Filed:
Nov. 24, 1999
Applicant:
Inventor:
Wolfgang Peetz, Fronreute-Blitzenreute, DE;
Assignee:
Hawera Probst GmbH, Ravensburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/044 ;
U.S. Cl.
CPC ...
E21B 1/044 ;
Abstract
A drilling tool, in particular a rock drill, is proposed, which is formed from a drill head, a clamping shank and a helical shank which is located between them. In order to produce a cost-effective drilling tool, the initial material used is a polygonal profile which is provided with a conveying helix groove in the region of the helical shank.