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:
Jun. 04, 2002
Filed:
Nov. 18, 1999
Hans Perlid, Dylta Bruk, SE;
Nitro Nobel AB, Nora, SE;
Abstract
A method and a device for charging boreholes ( ) with explosives. One end of the charging hose ( ) is introduced to a substantially predetermined distance from the bottom of the borehole. Subsequently, a pumpable explosive is pumped through the charging hose at a controlled rate and substantially simultaneously with the pumping of the explosive the charging hose is withdrawn from the borehole at a controlled rate. The explosive is caused to flow out from a nozzle ( ), arranged on said end of the charging hose ( ), in the form of a hollow cone ( ) and at high pressure, so that the outflowing explosive is given increased viscosity and by virtue of the high outflow rate cohesively adheres to the entire cylinder-shaped wall portion ( ) of the borehole ( ), upon which the explosive impinges in connection with said outflowing. With the aid of a centering device ( ), the nozzle ( ) is centered in the borehole ( ).