US4357873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for destroying structures such as concrete walls
Assignee: Airbus Defence and Space GmbH
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Filing: 1981-02-05
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Granted: 1982-11-09
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Expires: 2001-02-05
Abstract
Abstract A device for destroying structures such as concrete walls comprises first and second plates each including at least a portion of explosive material which are mounted on respective sides of the structure to be exploded, preferably in alignment. Each pair of explosive plates is exploded substantially simultaneously or in short succession in order to destroy the wall portion therebetween. Because of the detonation of both of the explosive plates, the structure therebetween will be disintegrated without fragments being catapulted away in a hazardous manner. With the inventive method, the plates are positioned on respective opposite sides of the structure in opposing relationship and the plates are exploded so as to generate shock waves which extend inwardly toward the structure therebetween.
Inventors
- 👤 Ernst H. Jager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
E; E04; E04G; E04G23/00; E04G23/08; F; F42; F42D; F42D3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
222 words
A device for destroying a reinforced concrete wall having a particular thickness and opposite side surfaces comprising: a first plate engaged over and covering an area of one side surface which area has dimensions that are large with respect to a thickness of said first plate; a second plate engaged over and covering an area of the other side surface which area has dimensions that are large with respect to a thickness of said second plate, said areas of the one and other side surfaces aligned with each other across the thickness of the wall; each of said first and second plates including at least a portion made of explosive material facing said areas respectively; holding means for holding said first and second plates firmly against said areas respectively; and ignition means connected to the explosive material of said first and second plates for successively igniting the explosive material of said first and second plates, said successive igniting occurring within a time period shorter than the time required for a shock wave produced by an explosion of the explosive material of one of said first and second plates to traverse the particular wall thickness whereby the explosive material of said first and second plates are ignited and exploded to produce shock waves in the wall which meet each other within the wall.
Claim 2
Independent Claim
222 words
A device for destroying a reinforced concrete wall having a particular thickness and opposite side surfaces comprising: a first plate engaged over and covering an area of one side surface which area has dimensions that are large with respect to a thickness of said first plate; a second plate engaged over and covering an area of the other side surface which area has dimensions that are large with respect to a thickness of said second plate, said areas of the one and other side surfaces aligned with each other across the thickness of the wall; each of said first and second plates including at least a portion made of explosive material facing said areas respectively; holding means for holding said first and second plates firmly against said areas respectively; and ignition means connected to the explosive material of said first and second plates for successively igniting the explosive material of said first and second plates, said successive igniting occurring within a time period shorter than the time required for a shock wave produced by an explosion of the explosive material of one of said first and second plates to traverse the particular wall thickness whereby the explosive material of said first and second plates are ignited and exploded to produce shock waves in the wall which meet each other within the wall.
Claim 3
Dependent Claim
24 words
A device according to claim 1 wherein first and second plates have different quantities of explosive material so that they have different blasting power.
Claim 4
Dependent Claim
19 words
A device according to claim 1 wherein said plates include portions having explosives of different characteristics and different orientations.
References Cited (Backward Citations)
US3999483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |