US4286708A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Module to prevent sympathetic detonations in munitions
Assignee: United States Department of the Navy
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Filing: 1979-08-21
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Granted: 1981-09-01
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Expires: 1999-08-21
Abstract
Abstract The sympathetic or chain reaction detonation of stacked munitions is preved by confining any random explosion essentially to a single explosive unit or container. Frangible inhibitor plates are located between adjacent munitions, such as artillery shells, so as to isolate the adjacent explosive units from a residual shock wave or case fragment that would otherwise trigger sympathetic detonation. The inhibitor plates may be constructed as part of a container in which an artillery shell may be stored, or the plates may be separately inserted between any adjacent warhead in any conventional storage pallet or transporting configuration. The plates are designed to absorb only that amount of explosive energy required to prevent sympathetic detonation, without requiring that the explosive forces be redirected away from adjacent shells, thus reducing the problem of redirected blast.
Inventors
- 👤 Francis B. Porzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:46
CPC Classifications
F; F42; F42B; F42B39/00; F42B39/14
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
101 words
An explosive unit storage means comprising: at least one storage cell for storing an explosive unit therein; at least one frangible sympathetic detonation prevention means proximate to said storage cell, whereby the pressure wave generated by a detonation of an explosive unit contained within said storage cell will be reduced in kinetic energy upon passing through said prevention means and thereby will lack sufficient energy to detonate any adjacently located explosive unit, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 2
Dependent Claim
101 words
An explosive unit storage means comprising: at least one storage cell for storing an explosive unit therein; at least one frangible sympathetic detonation prevention means proximate to said storage cell, whereby the pressure wave generated by a detonation of an explosive unit contained within said storage cell will be reduced in kinetic energy upon passing through said prevention means and thereby will lack sufficient energy to detonate any adjacently located explosive unit, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 3
Dependent Claim
45 words
The explosive unit storage means of claim 1, whereby said at least one storage cell comprises at least one wall, said frangible sympathetic detonation prevention means being proximate said wall, said wall extending beyond at least two edges of said frangible sympathetic detonation prevention means.
Claim 4
Dependent Claim
31 words
The explosive unit storage means of claim 1, whereby said at least one storage cell comprises at least one wall, said frangible sympathetic detonation prevention means being integral with said wall.
Claim 5
Dependent Claim
107 words
An explosive unit storage means comprising: a plurality of storage cells for storing explosive units therein; at least one frangible sympathetic detonation prevention means positioned between at last two of said plurality of storage cells, whereby the pressure wave generated by a detonation of an explosive unit contained within said storage cells will be reduced in kinetic energy upon passing through said sympathetic detonation prevention means and thereby will lack sufficient energy to detonate any adjacently located explosive, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 6
Dependent Claim
107 words
An explosive unit storage means comprising: a plurality of storage cells for storing explosive units therein; at least one frangible sympathetic detonation prevention means positioned between at last two of said plurality of storage cells, whereby the pressure wave generated by a detonation of an explosive unit contained within said storage cells will be reduced in kinetic energy upon passing through said sympathetic detonation prevention means and thereby will lack sufficient energy to detonate any adjacently located explosive, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 7
Dependent Claim
44 words
The explosive unit storage means of claim 4, whereby said storage means include at least one partition located between adjacent storage cells, said partition serving as a divider between said cells and having said at least one frangible sympathetic detonation prevention means proximate thereto.
Claim 8
Dependent Claim
19 words
The explosive unit storage means of claim 5, whereby said partition comprises a common wall between said storage cells.
Claim 9
Dependent Claim
26 words
The explosive unit storage means of claim 5, whereby said at least one frangible sympathetic detonation prevention means is integral with said at least one partition.
Claim 10
Dependent Claim
40 words
The explosive unit storage means of claim 5, whereby said frangible sympathetic detonation prevention means is located midway between the edges of said partition, said partition edges extending beyond at least two edges of said frangible sympathetic detonation prevention means.
Claim 11
Dependent Claim
46 words
The explosive unit storage means of claim 4, whereby said storage cells comprise a plurality of walls, adjacently located storage cells having in common at least one of said plurality of walls, said frangible sympathetic detonation prevention means being located proximate at least one common wall.
Claim 12
Dependent Claim
45 words
The explosive unit storage means of claim 4, whereby said storage cells are box-shaped having four walls, adjacent storage cells having in common at least one of said four walls, said frangible sympathetic detonation prevention means being located proximate said at last one common wall.
Claim 13
Dependent Claim
37 words
The explosive unit storage means of claim 4, whereby said storage cells are box-shaped having four walls, said at least one frangible sympathetic detonation prevention means being located proximate the junction of two of said four walls.
Claim 14
Dependent Claim
33 words
The explosive unit storage means of claims 9, 10 or 11, whereby said at least one frangile sympathetic detonation prevention means is formed integral with at least one wall of said storage cells.
Claim 15
Dependent Claim
69 words
An explosive unit storage means comprising: at least one explosive unit storage cell, said cell being box-shaped having four walls; at least one rectangular frangible sympathetic detonation prevention means being located on one of the four walls of said cell, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 16
Dependent Claim
69 words
An explosive unit storage means comprising: at least one explosive unit storage cell, said cell being box-shaped having four walls; at least one rectangular frangible sympathetic detonation prevention means being located on one of the four walls of said cell, wherein the detonation prevention means comprises at least one carrier element extending across the opening between explosive units and an energy absorption means supported by the said carrier element.
Claim 17
Dependent Claim
47 words
An explosive unit storage means comprising: at least one explosive unit storage cell, said cell being box-shaped having four walls; at least one L-shaped frangible sympathetic detonation prevention means being located at the juncture of two of the four walls of said at least one storage cell.
Claim 18
Dependent Claim
47 words
An explosive unit storage means comprising: at least one explosive unit storage cell, said cell being box-shaped having four walls; at least one L-shaped frangible sympathetic detonation prevention means being located at the juncture of two of the four walls of said at least one storage cell.
Claim 19
Dependent Claim
37 words
The explosive unit storage means of claim 13 and further comprising: at least one L-shaped frangible sympathetic detonation prevention means positioned at the juncture of two of the four walls of said at least one storage cell.
Claim 20
Dependent Claim
24 words
The explosive unit storage means of claim 15, wherein said rectangular and said L-shaped frangible sympathetic detonation prevention means are separable from said walls.
Claim 21
Dependent Claim
24 words
The explosive unit storage means of claim 15, wherein said rectangular and said L-shaped frangible sympathetic detonation prevention means are integral with said walls.
Claim 22
Dependent Claim
39 words
A frangible sympathetic detonation prevention means comprising: an energy absorption means insertable between adjacently stored explosive units, said absorption means allowing at least part of the pressure wave generated by the detonation of any explosive unit to pass therethrough.
Claim 23
Dependent Claim
39 words
A frangible sympathetic detonation prevention means comprising: an energy absorption means insertable between adjacently stored explosive units, said absorption means allowing at least part of the pressure wave generated by the detonation of any explosive unit to pass therethrough.
Claim 24
Dependent Claim
20 words
The frangible sympathetic detonation prevention means of claim 18, whereby said energy absorption means comprises an frangible flat, rectangular plate.
Claim 25
Dependent Claim
19 words
The frangible sympathetic detonation prevention means of claim 18, whereby said energy absorption means comprises a frangible L-shaped plate.
Claim 26
Dependent Claim
23 words
The frangible sympathetic detonation prevention means of claim 18, whereby said absorption means comprises at least two plates located in an abutting relationship.
Claim 27
Dependent Claim
21 words
The frangible sympathetic detonation prevention means of claim 21, whereby said at least two plates are fixably attached to each other.
Claim 28
Dependent Claim
32 words
The frangible sympathetic detonation prevention means of claim 18, whereby said absorption means is frangible, wherein the pressure wave created by the detonation of an explosive unit will shatter said absoprtion means.
Claim 29
Dependent Claim
32 words
The frangible sympathetic detonation prevention means of claims 20 or 21, whereby said absorption means permits said pressure wave to pass therethrough by said at least two plates separating from each other.
Claim 30
Dependent Claim
39 words
The explosive unit storage means of claim 1 wherein the carrier element comprises a wire support element and the energy absorption means comprises a panel member that covers only part of the area of the opening between explosive units.
Claim 31
Dependent Claim
21 words
The explosive unit storage means of claim 1 wherein the frangible sympathetic detonation prevention means comprises a thin wall metal plate.
Claim 32
Dependent Claim
31 words
The explosive unit storage means of claim 26 wherein the sympathetic detonation prevention means comprises a thin wall steel plate having a thickness varying from about 1/4 in to 3/4 inch.
Claim 33
Dependent Claim
17 words
The sympathetic detonation prevention means of claim 26 wherein the metal plate is L-shaped in cross section.
Claim 34
Dependent Claim
31 words
The explosive unit storage means of claim 1 wherein the energy absorption means is a thin wall metal plate that is positioned between two adjacent explosive units by a carrier means.
Claim 35
Dependent Claim
20 words
The explosive unit storage means of claim 29 wherein the carrier means is further defined as a pair of brackets.
Claim 36
Dependent Claim
19 words
The explosive unit storage means of claim 29 wherein the carrier means is further defined as a single wire.
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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |