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. 18, 2005
Filed:
Jan. 16, 2002
Applicant:
Martin Schautt, Munich, DE;
Inventor:
Martin Schautt, Munich, DE;
Assignee:
Hilti Aktiengesellschaft, Schaan, LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 1040 ; E21B 1016 ;
U.S. Cl.
CPC ...
Abstract
A drilling head of a rock drill for use with a hand-held power tool is formed completely of a hard material and includes a main bit () and at least one auxiliary bit (). The at least one auxiliary bit () is provided exclusively in a radially outer region of the drilling head and has an arcuate cutting edge ().