US4702322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosion suppression system
Assignee: McDonnell Douglas Corp
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Filing: 1986-07-25
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Granted: 1987-10-27
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Expires: 2006-07-25
Abstract
Abstract An externally mounted fire or explosion suppressing device for aircraft f tanks includes a bottle of pressurized fluid suppressant agent, the bottle having a primary duct ending in a seal disposed against the exterior surface of a tank wall. A secondary duct is disposed at an angle to the primary duct and carries a pyrotechnic charge that is detonated in response to an optically detected flash in the tank and explosively cuts through the seal and tank wall to release suppressant into the tank.
Inventors
- 👤 Steven D. Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:12
CPC Classifications
A; A62; A62C; A62C99/00; A62C99/0009; A62C99/0018; A62C35/00; A62C35/02; A62C35/08; B; B64; B64D; B64D37/00; B64D37/32; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1647
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A device for suppression of fire or explosion in a fuel tank having a tank wall, said device comprising: a flask or bottle for confining a fire suppressant medium under pressure, said bottle having a primary duct terminating in an end wall disposed against an external surface of said tank wall; a secondary duct extending at an angle from said primary duct; a charge of a fire suppressant medium contained under pressure in said bottle; and pyrotechnic means, disposed at the outer end of said secondary duct for explosively cutting through said end wall and a portion of said tank wall in registration therewith for releasing said fire suppressant medium into said tank.
Claim 2
Independent Claim
113 words
A device for suppression of fire or explosion in a fuel tank having a tank wall, said device comprising: a flask or bottle for confining a fire suppressant medium under pressure, said bottle having a primary duct terminating in an end wall disposed against an external surface of said tank wall; a secondary duct extending at an angle from said primary duct; a charge of a fire suppressant medium contained under pressure in said bottle; and pyrotechnic means, disposed at the outer end of said secondary duct for explosively cutting through said end wall and a portion of said tank wall in registration therewith for releasing said fire suppressant medium into said tank.
Claim 3
Dependent Claim
42 words
A device as defined in claim 1, and wherein: said secondary duct is disposed at an acute angle to said primary duct such that the axis of said secondary duct intersects the axis of said primary duct substantially at said end wall.
Claim 4
Dependent Claim
17 words
A device as defined in claim 2, and wherein said pyrotechnic means comprises a shaped explosive charge.
Claim 5
Dependent Claim
31 words
A device as defined in claim 3, and wherein said bottle, said primary and secondary ducts, and said pyrotechnic means are cooperable after activation to prevent fuel leakage from said tank.
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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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |