Patent US3721192A successfully refreshed from Google Patents.
US3721192A
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US
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Shaped charge
Assignee: United States Department of the Navy
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Filing: 1969-03-19
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Granted: 1973-03-20
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Expires: 1989-03-19
Abstract
Abstract A shaped charge which has as an improvement a layer of fine quality explosive positioned between the normal bulk explosive charge and liner thereby providing a detonating front which exhibits a low degree of turbulence along the interior wall of the metallic liner which makes a better shaped charge for use in precision metal deformation and other uses.
Inventors
- 👤 Ewan W Mc
- 👤 H Mallory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:42
CPC Classifications
F; F42; F42B; F42B1/00; F42B1/02
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
103 words
A shaped charge comprising a housing adapted to confine an explosive detonator and having an open end; a detonatable explosive charge positioned within said housing having a concave cavity oriented toward said open end of said housing; said charge comprising a member selected from the group consisting of HMX, PETN, RDX, pentolite, ednatol and Composition B; a metallic liner superimposed over said concave cavity; and a fine grade explosive layer of predetermined thickness positioned between said liner and said detonatable explosive; said layer consisting essentially of a high explosive compound having a particle size of about 200 Mu suspended in an isotropic media.
Claim 2
Dependent Claim
103 words
A shaped charge comprising a housing adapted to confine an explosive detonator and having an open end; a detonatable explosive charge positioned within said housing having a concave cavity oriented toward said open end of said housing; said charge comprising a member selected from the group consisting of HMX, PETN, RDX, pentolite, ednatol and Composition B; a metallic liner superimposed over said concave cavity; and a fine grade explosive layer of predetermined thickness positioned between said liner and said detonatable explosive; said layer consisting essentially of a high explosive compound having a particle size of about 200 Mu suspended in an isotropic media.
Claim 3
Dependent Claim
48 words
The shaped charge in accordance with claim 1 wherein said charge consists of Composition B; said liner consists of copper; and said layer consists of about 85 percent By weight PETN having a particle size of about 200 Mu suspended in about 15 percent by weight rubbery binder.
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) | 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 |