Patent US3861271A successfully refreshed from Google Patents.
US3861271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silo closure actuation
Assignee: United States Department of the Army
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Filing: 1973-06-20
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Granted: 1975-01-21
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Expires: 1993-06-20
Abstract
Abstract A missile silo for enclosing the missile prior to launch. The silo includes a closure (door) which is hardened against nuclear induced overpressure, ground shock, and radiation to provide a massive structure, usually of concrete and steel construction. Silo closure actuation means is provided to open the door to permit launching of the missile. No source of power, other than missile propellant energy is required for opening the door.
Inventors
- 👤 Jr Garland W Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:04
CPC Classifications
F; F41; F41F; F41F3/00; F41F3/04; F41F3/077
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
In a silo enclosing a missile, said silo having massive segmented closure members provided with underside surfaces tapered upwardly to the point of juncture of said closure members, means for rapidly opening said closure members comprising: foam means carried around said missile and extending upwardly between the nose of the missile and said closure members, said foam means having upper surfaces tapered in parallel relation to said tapered surfaces of said closure members and disposed in spaced relation with said closure members; and, means for propelling said missile upwardly whereby said tapered surfaces of said foam material engages said tapered surfaces of said closure members for displacement thereof.
Claim 2
Dependent Claim
108 words
In a silo enclosing a missile, said silo having massive segmented closure members provided with underside surfaces tapered upwardly to the point of juncture of said closure members, means for rapidly opening said closure members comprising: foam means carried around said missile and extending upwardly between the nose of the missile and said closure members, said foam means having upper surfaces tapered in parallel relation to said tapered surfaces of said closure members and disposed in spaced relation with said closure members; and, means for propelling said missile upwardly whereby said tapered surfaces of said foam material engages said tapered surfaces of said closure members for displacement thereof.
Claim 3
Dependent Claim
20 words
Apparatus as in claim 1 wherein said foam means is provided with boron additives for absorption of secondary gamma rays.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |