US3610150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting method
Assignee: Imperial Chemical Industries Ltd
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Filing: 1968-12-20
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Granted: 1971-10-05
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Expires: 1988-12-20
Abstract
Abstract Auxiliary explosive charge may be used to mix the ingredients of a shothole charge. Detonating fuse cord may thus be used to distribute fuel oil through ammonium nitrate which is loaded separately into the shothole.
Inventors
- 👤 Gordon Alger Teichmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:39
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08; F42D1/04; Y; Y10; Y10S; Y10S102/00; Y10S102/705
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
76 words
A method of blasting comprising: loading into a shothole a column of a main charge of blasting explosive, a column of powdered metal and an auxiliary charge of explosive having a higher velocity of detonation than the main charge, the auxiliary charge being surrounded by the column of powdered metal and being in sufficient amount to disperse at least part of the powdered metal in the after-detonation gases of the main charge; and detonating the charges.
Claim 2
Independent Claim
76 words
A method of blasting comprising: loading into a shothole a column of a main charge of blasting explosive, a column of powdered metal and an auxiliary charge of explosive having a higher velocity of detonation than the main charge, the auxiliary charge being surrounded by the column of powdered metal and being in sufficient amount to disperse at least part of the powdered metal in the after-detonation gases of the main charge; and detonating the charges.
Claim 3
Dependent Claim
28 words
A method as claimed in claim 1 wherein the main charge of blasting explosive is selected from the group consisting of an ANFO explosive and a slurried explosive.
Claim 4
Dependent Claim
26 words
A method as claimed in claim 1 wherein the main charge of blasting explosive is dispersed as an annular column around the powdered metal or metalloid.
Claim 5
Dependent Claim
17 words
A method as claimed in claim 1 wherein the auxiliary explosive charge is an elongated explosive charge.
Claim 6
Dependent Claim
16 words
A method as claimed in claim 1 wherein the auxiliary charge comprises a detonating fuse cord.
Claim 7
Dependent Claim
23 words
A method as claimed in claim 1 wherein the explosive charges and the column of powdered metal are disposed coaxially in the shothole.
Claim 8
Dependent Claim
25 words
A method as claimed in claim 1 wherein the powdered metal is selected from the group consisting of powdered aluminum magnesium, iron, silicon and boron.
Claim 9
Dependent Claim
69 words
A method as claimed in claim 1 which comprises disposing lengthwise in a shothole a length of detonating fuse cord surrounded aloNg at least part of its length with a column of powdered metal contained in a thin-walled container, loading a charge selected from the group consisting of ANFO and slurried explosive around the powdered metal in the shothole and detonating the detonating fuse cord and the explosive charge.
Claim 10
Dependent Claim
19 words
A method as claimed in claim 1 wherein the column of powdered metal is contained in tubular plastics film.
Claim 11
Dependent Claim
22 words
A method as claimed in claim 9 wherein the plastics film is selected from the group consisting of polyethylene and polyvinyl chloride.
Claim 12
Dependent Claim
63 words
An explosive charge comprising a column of a main charge of blasting explosive, a column of powdered metal and, surrounded by the column of powdered metal, an auxiliary charge of explosive of higher velocity of detonation than the main charge and in sufficient amount to disperse at least part of the column of powdered metal in the after-detonation gases of the main charge.
Claim 13
Dependent Claim
63 words
An explosive charge comprising a column of a main charge of blasting explosive, a column of powdered metal and, surrounded by the column of powdered metal, an auxiliary charge of explosive of higher velocity of detonation than the main charge and in sufficient amount to disperse at least part of the column of powdered metal in the after-detonation gases of the main charge.
Claim 14
Dependent Claim
26 words
An explosive charge assembly as claimed in claim 11 wherein the powdered metal is selected from the group consisting of aluminum, magnesium, iron, silicon and boron.
Claim 15
Dependent Claim
22 words
An explosive charge assembly as claimed in claim 11 wherein the powdered metal or metalloid is contained in a thin-walled tubular container.
Claim 16
Dependent Claim
17 words
An explosive charge assembly as claimed in claim 13 wherein the said container is tubular plastics film.
Claim 17
Dependent Claim
23 words
An explosive charge assembly as claimed in claim 14 wherein the plastic is selected from the group consisting of polyethylene and polyvinyl chloride.
Claim 18
Dependent Claim
14 words
An explosive charge as claimed wherein the auxiliary explosive charge is an elongated charge.
Claim 19
Dependent Claim
17 words
An explosive charge as claimed in claim 16 wherein the auxiliary explosive charge comprises detonating fuse cord.
Claim 20
Dependent Claim
25 words
An explosive charge as claimed in claim 11 wherein the main explosive charge is selected from the group consisting of ANFO and slurried blasting explosive.
Claim 21
Dependent Claim
24 words
An explosive charge assembly as claimed in claim 11 wherein the main explosive charge is disposed as an annular column around the powdered metal,
Claim 22
Dependent Claim
19 words
An explosive charge assembly as claimed in claim 19 wherein the explosive charges and the powdered metal are coaxial.
Claim 23
Dependent Claim
61 words
An explosive accessory for use in blasting comprising a column of powdered metal packed in a container and, surrounded by said column, a charge of explosive having a higher velocity of detonation than ANFO and in sufficient amount to disperse at least part of the powdered metal in the after-detonation gases of an explosive charge detonated in contact with the accessory.
Claim 24
Dependent Claim
61 words
An explosive accessory for use in blasting comprising a column of powdered metal packed in a container and, surrounded by said column, a charge of explosive having a higher velocity of detonation than ANFO and in sufficient amount to disperse at least part of the powdered metal in the after-detonation gases of an explosive charge detonated in contact with the accessory.
Claim 25
Dependent Claim
21 words
An explosive accessory as claimed in claim 21 wherein the powdered metal is packaged in a container of synthetic plastics film.
Claim 26
Dependent Claim
22 words
An explosive accessory as claimed in claim 22 wherein the plastic is selected from the group consisting of polyethylene and polyvinyl chloride.
Claim 27
Dependent Claim
16 words
An explosive accessory as claimed in claim 28 wherein the explosive charge comprises detonating fuse cord.
Claim 28
Dependent Claim
25 words
An explosive accessory as claimed in claim 28 wherein the powdered metal is selected from the group consisting of aluminum magnesium, iron, silicon, and boron.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-04 | 1975-04-05 | 1975-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-04 | 1979-04-05 | 1979-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-04 | 1983-04-05 | 1983-10-05 | $7700.00 | Window Closed / Lapsed |