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:
Jan. 25, 2005
Filed:
Dec. 12, 2002
Applicants:
Martin Richter, Freising, DE;
Udo Hauptmann, Landsberg/Lech, DE;
Stefen Götzfried, Kleinkitzighofen, DE;
Werner Kleine, Achim, DE;
Inventors:
Martin Richter, Freising, DE;
Udo Hauptmann, Landsberg/Lech, DE;
Stefen Götzfried, Kleinkitzighofen, DE;
Werner Kleine, Achim, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 1036 ; E21B 1062 ;
U.S. Cl.
CPC ...
Abstract
A drill head for rock drilling comprising cutting edges () made of hard material, which is detachably connected axially, over a bearing surface (), with a drilling shaft () with at least one radially projecting driver blade () by a bayonet-type connection slot (), wherein at least one connection slot () is present, which forms two axially opposing undercuts (), within which the driver blade () has limited axial movement.