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:
Dec. 24, 2024
Filed:
Oct. 20, 2021
Luossavaara Kiirunavaara Ab, Luleå, SE;
Nikolaos Petropoulos, Luleå, SE;
Luossavaara-Kiirunavaara AB, Luleå, SE;
Abstract
The present invention concerns an explosive material charging device () and a method of positioning the explosive material charging device () in a borehole (). The explosive material charging device () comprises a top anchor unit () and a bottom anchor unit () each configured to engage the borehole wall (), an expandable tube member () arranged between the top anchor unit () and the bottom anchor unit () and configured to be charged with explosive material (), the bottom anchor unit () comprises a backflow prevention valve device () configured to prevent the explosive material () to flow out from the expandable tube member (), wherein the backflow prevention valve device () is openable for permitting a charging hose () to enter the expandable tube member () for reaching the interior of the top anchor unit ().