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:
Mar. 10, 1981
Filed:
Mar. 08, 1979
Applicant:
Inventors:
Kuno Guse, Dortmund, DE;
Josef Schmitjans, Bochum, DE;
Assignee:
Bochumer Eisenhutte Heintzmann GmbH & Co., Bochum, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ; E21C / ;
U.S. Cl.
CPC ...
299 17 ; 299 34 ; 299 81 ; 175 67 ;
Abstract
A cutting tool has a cutting edge for cutting into a surface of material to be mined so that fissures develop in the region of the bottom of the cut. The cutting tool is provided with apertures adjacent said cutting edge. High pressure fluid medium jets are directed through the apertures in the cutting tool adjacent the cutting edge thereof and against the bottom of the cut so that such jets can enter into the fissures.