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. 27, 1980
Filed:
Nov. 17, 1977
Applicant:
Inventor:
Erik V Lavon, Saltsjo-Boo, SE;
Assignee:
Atlas Copco Aktiebolag, Nacka, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 16 ; 175 67 ; 239101 ; 299 29 ;
Abstract
A hard compact material, such as rock, is broken by driving a longish mass body of relatively incompressible fluid, such as water, against the material to be broken. The mass body is caused to impact the material at a momentum required for breaking the material. The required momentum is obtained by adding the momentum of at least two fluid mass bodies. The longish mass body can be aligned with a drill hole by means of the drill bit and rod. The energy generator or fluid gun and the gun barrel can be made in separable units.