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:
Dec. 09, 2003
Filed:
Jun. 13, 2002
Applicant:
Inventors:
Werner Kleine, Achim, DE;
Hans-Werner Bongers-Ambrosius, Munich, DE;
Udo Hauptmann, Landsberg/Lech, DE;
Martin Richter, Freising, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/016 ;
U.S. Cl.
CPC ...
E21B 1/016 ;
Abstract
A rock drill including a drilling rod ( ), a cup-shaped drilling head ( ) secured to the drilling rod ( ) at one of its ends, and connection elements including at least one radially projecting, entraining web ( ) associated with the drilling rod ( ) and received in at least one axially extending entrain slot ( ) which is formed in an entrain surface of the cup-shaped drilling head ( ) for securing the drilling head ( ) to the drilling rod ( ) for joint rotation therewith and for a limited axial displacement relative thereto.