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. 16, 1994
Filed:
Jun. 28, 1993
Applicant:
Inventors:
Kevin C Lent, Rogers, MN (US);
Brad L Holsapple, Metamora, IL (US);
Assignee:
Caterpillar Paving Products Inc., Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 10 ; 299 39 ; 299 86 ;
Abstract
A method of mining includes striking the surface of friable to brittle, essentially homogeneous mineral materials with a plurality of concave-faced cutting tools rotating about a longitudinal axis disposed substantially parallel with the surface of the mineral material. Segments of the mineral material are cleaved by the cutting tools as the tools strike the surface and then pass along a predetermined path completely through the mineral material.