US3721471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill-and-blast module
Assignee: ETI EXPLOSIVES TECHNOLOGIES INTE
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Filing: 1971-10-28
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Granted: 1973-03-20
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Expires: 1991-10-28
Abstract
Abstract Working, e.g., excavating, a geological mass by a succession of substantially continuous drill-load-blast sequences, each sequence comprising drilling a hole in the mass, placing a charge of condensed secondary explosive in the hole, and initiating the charge by projecting propagative energy, e.g., the kinetic energy of a high-velocity projectile, through an inactive medium, e.g., the atmosphere, to the charge from a location which confronts, and is separated from, the hole in a manner such that energy is released into the charge at a rate sufficiently high to cause detonation thereof. An apparatus including drilling means, explosives-delivery means, and means for projecting energy, e.g., a gun, mounted on support means that preferably can be moved so as to position the drilling means, explosives delivery means, and energy-projection path sequentially on substantially a common axis.
Inventors
- 👤 O Bergmann
- 👤 D Coursen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:31
CPC Classifications
F; F42; F42D; F42D3/00; F42D3/04; E; E21; E21C; E21C37/00; E21C37/005; E21D; E21D9/00; E21D9/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
253 words
Apparatus for rapidly working a geological mass which comprises, in combination, a. drilling means comprising an elongated member having a bit at one end and positioned on support means in axially movable relationship therewith; b. explosives-delivery means for delivering explosive into a hole made by said drilling means, said explosives-delivery means being positioned on support means in axially movable relationship therewith and in predetermined alignment with respect to said drilling means, said explosives-delivery means comprising a tube having one discharge end and an explosives feed en; and c. means for projecting energy for initiating explosive delivered into a hole by said explosives-delivery means, said energy-projecting means being positioned on support means in predetermined alignment with said drilling means and said explosive-delivery means, said drilling means, explosivesdelivery means, and energy-projecting means being (1) supported in a manner such that the bit of said drilling means, discharge end of said explosive-delivery means, and energy-exiting end of said energy-projecting means are located near a common, operating end, and (2) positioned, or adapted to be positioned, in a manner such that said energy-projecting means projects energy on a path that leads into an explosive charge delivered by said explosives-delivery means into a hole drilled by said drilling means; and the movable relationship of said drilling means and explosives-delivery means with the support means being such that the bit of said drilling means and the discharge end of said explosives-delivery means extend sequentially beyond all other components of said apparatus in an axial direction at said operating end.
Claim 2
Dependent Claim
253 words
Apparatus for rapidly working a geological mass which comprises, in combination, a. drilling means comprising an elongated member having a bit at one end and positioned on support means in axially movable relationship therewith; b. explosives-delivery means for delivering explosive into a hole made by said drilling means, said explosives-delivery means being positioned on support means in axially movable relationship therewith and in predetermined alignment with respect to said drilling means, said explosives-delivery means comprising a tube having one discharge end and an explosives feed en; and c. means for projecting energy for initiating explosive delivered into a hole by said explosives-delivery means, said energy-projecting means being positioned on support means in predetermined alignment with said drilling means and said explosive-delivery means, said drilling means, explosivesdelivery means, and energy-projecting means being (1) supported in a manner such that the bit of said drilling means, discharge end of said explosive-delivery means, and energy-exiting end of said energy-projecting means are located near a common, operating end, and (2) positioned, or adapted to be positioned, in a manner such that said energy-projecting means projects energy on a path that leads into an explosive charge delivered by said explosives-delivery means into a hole drilled by said drilling means; and the movable relationship of said drilling means and explosives-delivery means with the support means being such that the bit of said drilling means and the discharge end of said explosives-delivery means extend sequentially beyond all other components of said apparatus in an axial direction at said operating end.
Claim 3
Dependent Claim
37 words
An apparatus of claim 1 wherein the support means is movable by an indexing means that cooperates therewith and is adapted to sequentially position said drilling means and said explosives-delivery means on substantially a common longitudinal axis.
Claim 4
Dependent Claim
37 words
An apparatus of claim 2 wherein the support means is movable by an indexing means that cooperates therewith and is adapted to sequentially position the energy-projecting path of said energy-projecting means on substantially said common longitudinal axis.
Claim 5
Dependent Claim
12 words
An apparatus of claim 3 wherein the support means is pivotally movable.
Claim 6
Dependent Claim
27 words
An apparatus of claim 1 wherein the support means is positioned on a mounting member for the apparatus and in axially movable relationship with said mounting member.
Claim 7
Dependent Claim
56 words
An apparatus of claim 5 wherein said mounting member is affixed to the inside wall of a housing member having a closure member affixed to its end at the operating end of said apparatus, said closure member being adapted to open and close and having an aperture theRein in the energy-projecting path of said energy-projecting means.
Claim 8
Dependent Claim
12 words
An apparatus of claim 1 wherein said energy-projecting means is a gun.
Claim 9
Dependent Claim
12 words
Apparatus of claim 1 wherein said energy-projecting means is a pulsed laser.
Claim 10
Dependent Claim
17 words
Apparatus of claim 8 wherein a focussing lens is present in the path of the laser beam.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |