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US4299166A Expired / Lapsed US ⏱️ 0.0 years remaining

Containment and release device for fluids

Assignee: United States Department of the Air Force
•
Filing: 1979-11-21
•
Granted: 1981-11-10
•
Expires: 1999-11-21
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Abstract

Abstract A dispenser retains a hermetically sealed metal canister which holds a pyrophoric fluid, radar chaff, other electronic countermeasure materials or a combination thereof for ejection from an aircraft. Several openings in the canister are sealed with Pyrofuze foil material closures and a Pyrofuze wire braid is interconnected between each of the closures and the canister in close proximity to a Pyrofuze delay braid having one end thereof fixedly attached to the canister. A safety tab on one corner of the canister extends downward between the delay braid and the wire braid to prevent cross ignition until the canister is fully ejected from the dispenser. When a gas producing squib on the dispenser is fired, the Pyrofuze delay braid is ignited by the flame front from the squib and the canister is forced from the dispenser causing the safety tab to be automatically removed from the canister. This allows the delay braid to ignite the Pyrofuze wire braid which burns to each of the closures causing them to burn away thereby releasing and igniting the pyrophoric material from the canister.

Inventors

  • 👤 Donald J. Carignan
  • 👤 William Lewis

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 20:38
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/56; F42B12/70

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 141 words
A device for controllably releasing pyrophoric fluids and the like from an aircraft comprising, a dispenser having a substantially open lower end, a hermetically sealed canister in said dispenser, said canister holding a quantity of pyrophoric fluid therein, means for ejecting said canister from the open lower end of said dispenser, a series of covered openings in the walls of said sealed canister, said openings being covered with a self-alloying metallic material, a wire braid of self-alloying material interconnecting the series of covered openings for producing an exothermic reaction to cause the material covering said openings to be consumed, and means for igniting the wire braid of self-alloying material at the proper time whereby said pyrophoric material is released and ignited in a controlled manner after said canister is ejected from said dispenser and openings in said canister have been uncovered.
Claim 2
Independent Claim 141 words
A device for controllably releasing pyrophoric fluids and the like from an aircraft comprising, a dispenser having a substantially open lower end, a hermetically sealed canister in said dispenser, said canister holding a quantity of pyrophoric fluid therein, means for ejecting said canister from the open lower end of said dispenser, a series of covered openings in the walls of said sealed canister, said openings being covered with a self-alloying metallic material, a wire braid of self-alloying material interconnecting the series of covered openings for producing an exothermic reaction to cause the material covering said openings to be consumed, and means for igniting the wire braid of self-alloying material at the proper time whereby said pyrophoric material is released and ignited in a controlled manner after said canister is ejected from said dispenser and openings in said canister have been uncovered.
Claim 3
Dependent Claim 57 words
The device for controllably releasing pyrophoric fluids defined in claim 1 wherein the means for ejecting the canister from the open lower end of the dispenser includes gas producing squib positioned in the closed upper end of the dispenser, said gas producing squib producing a flame front in the region of the upper surface of the canister.
Claim 4
Dependent Claim 68 words
The device for controllably releasing pyrophoric fluids defined in claim 2 wherein the means for igniting the interconnecting wire braid at the proper time includes a delay braid of self-alloying material positioned at the upper surface of said canister, said delay braid being ignited by the flame front from said squib and burning at the fixed rate to control time lapse prior to ignition of the interconnecting braid.
Claim 5
Dependent Claim 63 words
The device for controllably releasing pyrophoric fluids defined in claim 3 wherein a safety tab is positioned on the upper surface of said canister between the delay braid and the flame front from the squib, said safety tab being automatically removed when said ejector is fully ejected from said dispenser thereby exposing the delay braid to the flame front to allow ignition thereof.

References Cited (Backward Citations)

CA674645A Cited
US2911504A Cited
US3319520A Cited
US3433437A Cited
US4005690A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-11-09 1985-05-11 1985-11-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-11-09 1989-05-11 1989-11-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-11-09 1993-05-11 1993-11-10 $7700.00 Window Closed / Lapsed

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