US3855929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linear shaped charge device
Assignee: EXPLO RIDGEWAY INT Ltd
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Filing: 1972-02-07
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Granted: 1974-12-24
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Expires: 1992-02-07
Abstract
Abstract An improved linear shaped charge device, particularly for underwater use, wherein there is structurally included an integral air tight standoff to precisely separate the chevron shaped explosive chamber from the work piece and having optimum, critical dimensions for the angle of the chevron, liner thickness and standoff distance. The whole linear shaped charged device is integrally extruded of aluminum and uses a non-detonatable, multi-component explosive for safety. Besides being purely linear, the device has an outer circular cutter configuration (FIG. 2) and an inner circular cutter configuration (FIGS. 3 and 4).
Inventors
- 👤 J Ridgeway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:54
CPC Classifications
F; F42; F42D; F42D3/00; F42B; F42B3/00; F42B3/08; Y; Y10; Y10S; Y10S102/00; Y10S102/705
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
57 words
An improved linear shaped charge device comprising a hollow chevron-shaped explosive chamber and integrally formed therewith an air tight, hollow stand-off chamber located adjacent to and below said chevron-shaped explosive chamber, the bottom, interior wall of said explosive chamber being an explosive liner wall, and both hollow chambers being constructed from extrudable metal as a one-piece extrusion.
Claim 2
Dependent Claim
57 words
An improved linear shaped charge device comprising a hollow chevron-shaped explosive chamber and integrally formed therewith an air tight, hollow stand-off chamber located adjacent to and below said chevron-shaped explosive chamber, the bottom, interior wall of said explosive chamber being an explosive liner wall, and both hollow chambers being constructed from extrudable metal as a one-piece extrusion.
Claim 3
Dependent Claim
19 words
The device of claim 1 wherein said explosive liner wall has a thickness between 0.162 inches and 0.198 inches.
Claim 4
Dependent Claim
15 words
The device of claim 2 wherein the entire device is formed of one-piece extruded aluminum.
Claim 5
Dependent Claim
12 words
The device of claim 3 wherein said aluminum is type 6061 aluminum.
Claim 6
Dependent Claim
32 words
The device of claim 1 wherein the explosive used to power said device iS mixed from two or more non-detonatable components which when mixed in said explosive chamber becomes a liquid explosive.
Claim 7
Dependent Claim
46 words
The device of claim 1 wherein the distance between the apex of the explosive chamber and the bottom of the stand-off chamber is a minimum of two inches and the central apex angle of the bottom wall of the explosive chamber being between 82* and 88*.
Claim 8
Dependent Claim
25 words
The device of claim 1 wherein the bottom wall of the stand-off chamber is V-shaped, the apex being at the bottom of the stand-off chamber.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |