Explosive cartridge assembly for presplitting rock
US5798477A · kind A · utility
Inventors
Key dates
| Filing date | Dec 18, 1996 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Dec 18, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B3/26
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention includes a small diameter explosive cartridge and a two-stage large diameter explosive cartridge apparatus for presplitting rock can be axially detonated by detonating cord through a central detonation passageway in the explosive cartridge while keeping the detonating cord and the explosive material in the explosive cartridge physically separate. The explosive cartridge includes an outer tube and an inner tube inside of the outer tube. The explosive cartridge includes two or more continuous webs extending radially between the outer surface of the inner tube and the inner surface of the outer tube. For the small diameter explosive cartridge, the space between the outer surface of the inner tube and the inner surface of the outer tube is filled with high explosive material such as water gel or emulsion explosive material. The inside of the inner tube forms a central detonation passageway axially through the small diameter explosive cartridge through which detonating cord can be strung to provide axial detonation and to provide effective detonation between each of the small diameter explosive cartridges when the small diameter explosive cartridges are assembled o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.