US3831522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive booster and container therefor
Assignee: Individual
•
Filing: 1973-03-02
•
Granted: 1974-08-27
•
Expires: 1993-03-02
Abstract
Abstract A plastic shell or container casing for explosive charges, particularly small explosive charges of higher sensitivity, is injection molded in parts with sufficient precision that it can be assembled with liquid-tight joints without adhesives or heatsealing. The casing or shell is formed with one or more integral tubes or recesses for receiving an initiator or primary detonator, such as a blasting cap or a detonating cord, or both. The separate parts of the container may be formed as a main receptacle and a closure, or as two half-casings or containers, or in other minor and major part combinations. The parts are designed with tight frictional connections but may include locking or semi-locking joints, to resist unauthorized tampering as well as to protect the contents against intrusion of water or other external liquids. Design features preferably include an inner structure or receptacle for holding a core of hypersensitive explosive, capable per se of detonation by a small initiator, to magnify the initiatory detonation and thus set off a surrounding charge of less sensitive material which could not be reliably detonated per se by the primary initiator.
Inventors
- 👤 R Romney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:21
CPC Classifications
F; F42; F42B; F42B3/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
190 words
A casing or shell for an explosive booster comprising, in combination, a precision molded resinous peripheral outer wall, a molded resinous bottom wall secured to said peripheral wall, a molded resinous top wall also secured to the peripheral wall by a friction joint fitted with such accuracy as to exclude liquid passage through the joint, at least one continuous tubular element formed to provide a conduit passing through both said top wall and said bottom wall, said tubular element also being connected with said top and bottom walls to assist in holding them in assembled relationship, said tubular element being sized to receive in its conduit a standard primary detonator or initiator, a core-positioning means associated with said tubular element for locating and holding a core of cap-sensitive explosive material in the general center of mass of the casing and in position spaced from both the top and bottom walls thereof so as to be surrounded by filling material when the casing is filled for use as a booster, and a liquid-tight joint between the respective ends of the tubular element and the top and bottom walls of the casing.
Claim 2
Dependent Claim
190 words
A casing or shell for an explosive booster comprising, in combination, a precision molded resinous peripheral outer wall, a molded resinous bottom wall secured to said peripheral wall, a molded resinous top wall also secured to the peripheral wall by a friction joint fitted with such accuracy as to exclude liquid passage through the joint, at least one continuous tubular element formed to provide a conduit passing through both said top wall and said bottom wall, said tubular element also being connected with said top and bottom walls to assist in holding them in assembled relationship, said tubular element being sized to receive in its conduit a standard primary detonator or initiator, a core-positioning means associated with said tubular element for locating and holding a core of cap-sensitive explosive material in the general center of mass of the casing and in position spaced from both the top and bottom walls thereof so as to be surrounded by filling material when the casing is filled for use as a booster, and a liquid-tight joint between the respective ends of the tubular element and the top and bottom walls of the casing.
Claim 3
Dependent Claim
45 words
A booster casing according to claim 1 in which the bottom wall of said casing is molded integrally with the side wall and in which the top or cover wall is formed separately and is secured to the side wall by a circumferential friction joint.
Claim 4
Dependent Claim
28 words
A booster casing according to claim 1 in which the core-locating element is an annular structure integral with the bottom wall of the casing and projecting upwardly therefrom.
Claim 5
Dependent Claim
21 words
A booster casing according to claim 1 in which the core-locating element is an integral projecting part of a said conduit.
Claim 6
Dependent Claim
51 words
A booster casing according to claim 1 in which the casing is formed in two similar and peripherally matching half-casings, with means for interlocking the half-casings together around their matching pripheries and which includes other tension means for locking said two half-casings together and comprising at least one of said conduits.
Claim 7
Dependent Claim
87 words
A booster casing according to claim 1 in which a top or cover member comprising said top wall is connected peripherally in a friction fitted liquid-tight joint to a lower member and in which at least one conduit for the initiator or detonator cord is comprised of metal and extends from the said top wall through the bottom wall, and means on said conduit for locking the bottom wall with respect to the top wall and comprising a liquid-tight joint between said conduit member and said wall.
Claim 8
Dependent Claim
89 words
A booster casing according to claim 1 in which two identical upper and lower half-casing members are secured together in a circumferential seam or joint of rebate cross-section, one half of said joint being internal and the other peripheral half being external with respect to one of said members, and in which one conduit for said initiator or detonator is integral with each Half-casing and has its free end frictionally engaged with said other half-casing to form a liquid-tight connection and to assist in holding the two half-casings together.
Claim 9
Dependent Claim
65 words
A booster casing according to claim 7 which includes elements projecting from each of the half-casings toward the other for locating and holding in place a booster core, a cap-sensitive core held by said projecting elements, and a filler of explosive booster material surrounding said core which filler is detonable by said core but is not reliably detonable by a standard cap or detonating cord.
References Cited (Backward Citations)
US1997958A
Cited
US3037453A
Cited
US3491687A
Cited
US3613582A
Cited
US3438325A
Cited
US3507218A
Cited
US3747527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |