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. 04, 1995
Filed:
Oct. 29, 1993
Applicant:
Inventors:
Bernhard Moser, Altshausen, DE;
August Haussmann, Ravensburg, DE;
Hans-Ulrich Muetschele, Stuttgart, DE;
Harald Schindler, Stuttgart, DE;
Hans-Peter Meyen, Filderstadt, DE;
Assignees:
Hawera Probst GmbH & Co., Ravensburg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ; E21B / ;
U.S. Cl.
CPC ...
408225 ; 175323 ; 175394 ; 408227 ;
Abstract
A drilling tool and, in particular, a rock drill for the creation of breaches in concrete or masonry for the use of drill hammers is proposed, which is configured as a cross drill bit having four cutting fins. In order to optimize drilling capacity, the drilling tool is provided with a cross drilling head which merges in one piece into a conveyor spiral matched to the drill head. A purpose-specific cutting element facing serves to optimize the drilling capacity.