US3698281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive system
Assignee: Lockheed Martin Corp
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Filing: 1970-02-27
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Granted: 1972-10-17
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Expires: 1990-02-27
Abstract
Abstract A steel tube having a flattened or oval cross section contains a pair of explosive cores. A sheath of pliable material such as silicone rubber surrounds and holds the core separated from each other and generally centered with respect to the steel tube. The rubber (1) protects the explosive cores from environmental temperature changes, and (2) absorbs the shock of detonation such that one of the cores may be detonated while the other remains undetonated as a reserve for redundancy of the system. Upon detonation of an explosive core, the steel tube expands from the flattened or oval cross section to a circular cross section; whereupon a pair of doublers enclosing the tube are fractured and separated along a weakened section underlying a notch or groove which extends longitudinally along a doubler joint and along the steel tube.
Inventors
- 👤 Oscar E Brandt
- 👤 Joseph G Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:17
CPC Classifications
F; F42; F42B; F42B15/00; F42B15/36; F42B15/38; C; C06; C06C; C06C5/00; C06C5/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
158 words
A low shock explosive system comprising: a separation member including an elongated plate with a rupturable weakened section; an expandable metal tubular member; means for closely confining said tubular member adjacent to the weakened section of the separation member in the path of expansion of said tubular member, said tubular member being elongaged in one dimension in crosssection; a pair of explosive cores continuously spaced apart in said elongage dimension and positioned within the cavity formed by said tubular member and extending continuously through said tubular member; a thermal insulating and shock absorbing material surrounding both said explosive cores and encased within and substantially filling the cavity formed by the tubular member, said material continuously separating said explosive cores and preventing cross-detonation therebetween; and means for separately detonating the explosive cores so that gaseous detonation products expand the tubular member while being contained thereby and so that the tubular member will expand against and rupture the separation member.
Claim 2
Dependent Claim
158 words
A low shock explosive system comprising: a separation member including an elongated plate with a rupturable weakened section; an expandable metal tubular member; means for closely confining said tubular member adjacent to the weakened section of the separation member in the path of expansion of said tubular member, said tubular member being elongaged in one dimension in crosssection; a pair of explosive cores continuously spaced apart in said elongage dimension and positioned within the cavity formed by said tubular member and extending continuously through said tubular member; a thermal insulating and shock absorbing material surrounding both said explosive cores and encased within and substantially filling the cavity formed by the tubular member, said material continuously separating said explosive cores and preventing cross-detonation therebetween; and means for separately detonating the explosive cores so that gaseous detonation products expand the tubular member while being contained thereby and so that the tubular member will expand against and rupture the separation member.
Claim 3
Dependent Claim
125 words
A low shock explosive system in accordance with claim 1 wherein the separation member comprises two generally planar and parallel doublers fastened together with the tubular member there between, each doubler being an elongated strip and having flange parts along each edge and central part connecting the flanges, said flanges being fastened together and adapted to hold a structural part to be separated therebetween, said central parts being offset from each other to provide sufficient space to contain the tubular member in an initial oval configuration, said central part of each doubler having a weakened section extending longitudinally to provide a line for rupture and separation when the explosive core is detonated and the tubular member expands from the oval configuration to a circular configuration.
Claim 4
Dependent Claim
46 words
A low shock explosive system in accordance with claim 2 wherein the weakened section of the doubler comprises a relatively thin section of material which underlies a notch formed in each doubler, said notch being centered in the offset central part midway between the edge flanges.
Claim 5
Dependent Claim
66 words
A low shock explosive system in accordance with claim 2 further comprising a plurality of straps encircling the tubular member between the doublers and fastened to the flanges on one side of the doublers, said straps being operable to hold the tubular member to one side of the doubler after detonation of the explosive core and after the doublers have ruptured and separated in two parts.
Claim 6
Dependent Claim
51 words
A low shoCk explosive system in accordance with claim 1 further comprising a detonator assembly attached to the end of the tubular member for initiating detonation of the explosive cores, said detonator assembly containing two electrically actuable detonators, each of the explosive cores having an end extending to a respective detonator.
Claim 7
Dependent Claim
44 words
A low shock explosive system in accordance with claim 5 wherein the detonator assembly includes a metal plate to which an end of the tubular member is attached, and wherein the explosive cores entrend through a hole in the metal plate to the detonator.
Claim 8
Dependent Claim
39 words
A low shock explosive system in accordance with claim 5 wherein two detonation assemblies are provided, one detonation assembly being attached to each end of the tubular member whereby the explosive cores may be detonated simultaneously from both ends.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |