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:
May. 16, 1989
Filed:
May. 28, 1987
Applicant:
Inventors:
Hermanus Q Van der Westhuizen, Pretoria, ZA;
Thomas M Muller, Boksburg, ZA;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F42D / ; F42D / ;
U.S. Cl.
CPC ...
102303 ; 299 13 ;
Abstract
The invention relates to a rock breaking tool having a barrel insertable into a pre-drilled, water-filled hole of the rock. The rock breaking tool utilizes a firing chamber to discharge a cartridge into the barrel. A blast absorbing mat is located over the tool to retain the tool in position in the hole during discharge. The invention also relates to the method of using the rock breaking tool.