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:
Aug. 06, 2002
Filed:
Aug. 08, 2000
Applicant:
Inventors:
Assignee:
Hawera Probst GmbH, Ravenburg, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 1/722 ; E21B 1/044 ;
U.S. Cl.
CPC ...
E21B 1/722 ; E21B 1/044 ;
Abstract
The invention proposes a drilling tool, in particular rock-drilling tool for rotary and/or percussive operation, in which, for the purpose of improving the drilling properties, the drilling-dust discharge groove is subdivided into at least two discharge-groove sections, each section having its own drilling-dust-carrying surface.