May 5, 2026

US12618657 - Explosive material charging device for charging a borehole method of positioning an explosive material charging device explosive material charging vehicle and data medium

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.

Assignee: Luossavaara-Kiirunavaara AB
Inventors: Nikolaos Petropoulos
Filing date: 2024-11-18

explosiveboreholechargingdevice

The invention describes an explosive material charging device designed for use in boreholes, featuring a top and bottom anchor unit, an expandable tube for holding explosive material, and a backflow prevention valve to control the flow of the material. This device allows for efficient charging while preventing backflow, ensuring safety and effectiveness during the charging process.

Claim 1

1 . An explosive material charging device configured to charge an explosive material in a borehole, the explosive material charging device comprising: a charging hose comprising a nozzle; an anchoring unit configured to engage with a borehole wall; an expandable tube member comprising a top portion and a bottom portion, the expandable tube member extending between the top portion and the bottom portion, the expandable tube member configured to expand in a longitudinal orientation responsive to a force of friction between the anchoring unit and the borehole wall as the nozzle of the charging hose pushes the expandable tube member in the borehole; and a backflow prevention valve device comprising a flap member and configured to inhibit the explosive material to flow out from the bottom portion of the expandable tube member, the backflow prevention valve device openable for permitting the charging hose to enter the expandable tube member for reaching the top portion of the expandable tube member, the backflow prevention valve device configured to close the flap member subsequent to the nozzle of the charging hose being withdrawn from the backflow prevention valve device. a charging hose comprising a nozzle; an anchoring unit configured to engage with a borehole wall; an expandable tube member comprising a top portion and a bottom portion, the expandable tube member extending between the top portion and the bottom portion, the expandable tube member configured to expand in a longitudinal orientation responsive to a force of friction between the anchoring unit and the borehole wall as the nozzle of the charging hose pushes the expandable tube member in the borehole; and a backflow prevention valve device comprising a flap member and configured to inhibit the explosive material to flow out from the bottom portion of the expandable tube member, the backflow prevention valve device openable for permitting the charging hose to enter the expandable tube member for reaching the top portion of the expandable tube member, the backflow prevention valve device configured to close the flap member subsequent to the nozzle of the charging hose being withdrawn from the backflow prevention valve device.

Google Patents

https://patents.google.com/patent/US12618657

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12618657