US4004515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sequential jet shaped charge
Assignee: United States Department of the Navy
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Filing: 1971-01-25
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Granted: 1977-01-25
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Expires: 1991-01-25
Abstract
Abstract An explosive device comprising a plurality of serially spaced shaped char with a flat metal washer at the base of each upper charge which washer is propelled across an annular space, at a known velocity, to impact and thereby initiate the explosive charge driving the next jet in sequence. A metal shield down the center of the charge provides a channel for passage of the jets generated and also, said shield by collapsing under the action of the explosive, propels a particular washer associated therewith and clips off the slow non-penetrating end of each jet, minimizing the required time delay between jets.
Inventors
- 👤 Herbert D. Mallory
- 👤 Frank R. Marquardt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:15
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/04; F42B12/10; F42B12/16; F42B12/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
130 words
An explosive assembly comprising: an elongated housing having a longitudinal axis of symmetry, an initiation end, and a terminal end; a first shaped explosive charge supported in the initiation end of said housing and having an opening therein; at least one additional shaped explosive charge supported in the terminal end of said housing and having an opening therethrough; said first and additional charges being spaced apart in said housing so that a torroidal air space exists therebetween; each said opening and space having an axis of symmetry coincident with said longitudinal axis of symmetry; a hollow tube connecting said openings through said space; and a torroidal metal transfer plate fastened in said assembly adjacent the base of said first charge for transferring detonation between said first and said additional charge.
Claim 2
Dependent Claim
130 words
An explosive assembly comprising: an elongated housing having a longitudinal axis of symmetry, an initiation end, and a terminal end; a first shaped explosive charge supported in the initiation end of said housing and having an opening therein; at least one additional shaped explosive charge supported in the terminal end of said housing and having an opening therethrough; said first and additional charges being spaced apart in said housing so that a torroidal air space exists therebetween; each said opening and space having an axis of symmetry coincident with said longitudinal axis of symmetry; a hollow tube connecting said openings through said space; and a torroidal metal transfer plate fastened in said assembly adjacent the base of said first charge for transferring detonation between said first and said additional charge.
Claim 3
Dependent Claim
54 words
The assembly of claim 1 further comprising: one or more intermediate shaped charges spaced in said housing between said first and said additional charges; each said intermediate charge having a detonation transfer space between it and the next lower charge; and like means in each such space for transferring detonation to said lower charge.
Claim 4
Dependent Claim
127 words
A sequential jet shaped charge explosive device comprising: an elongated cylindrical housing having an initiation end and a terminal end; a plurality of shaped charge explosive means spaced lengthwise within said housing; one of said shaped charge means being adjacent said initiation end and comprising explosive initiating means; each said shaped charge means being spaced from each other shaped charge means by a measured space; a metal transfer plate positioned in each said space adjacent the bottom of that shaped charge means nearest said initiation means; the arrangement of said shaped charge means and said transfer plate means being such that when each said shaped charge is detonated, the transfer plate means adjacent thereto is propelled across said space impinging upon and detonating the next shaped charge.
Claim 5
Dependent Claim
127 words
A sequential jet shaped charge explosive device comprising: an elongated cylindrical housing having an initiation end and a terminal end; a plurality of shaped charge explosive means spaced lengthwise within said housing; one of said shaped charge means being adjacent said initiation end and comprising explosive initiating means; each said shaped charge means being spaced from each other shaped charge means by a measured space; a metal transfer plate positioned in each said space adjacent the bottom of that shaped charge means nearest said initiation means; the arrangement of said shaped charge means and said transfer plate means being such that when each said shaped charge is detonated, the transfer plate means adjacent thereto is propelled across said space impinging upon and detonating the next shaped charge.
References Cited (Backward Citations)
US3215074A
Cited
US3416449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |