F - Mech Eng,Light,Heat,Weapons – 42 – B
Patent
F - Mech Eng,Light,Heat,Weapons
42
B
F42B 39/14 (2006.01) F42B 39/20 (2006.01)
Patent
CA 2699977
The invention provides rupturing devices for mitigating the explosive reaction of a casing (121), hollow tubular body or container, particularly a munition, when it is subject to an external thermal hazard threat. The devices are based on the use of shape memory alloys. The device comprises an element of shape memory alloy (123) which is joined together by a connector (122) to form an annulus, which may be located on an exterior surface of a munitions casing (121) or launch such that upon heating through its transition temperature range will cause the annulus to contract radially inwardly, thereby rupturing the munition (121), allowing any build up of pressure to be released quickly. Advantageously, the connector (122) is. reversible such that the device will be capable of being retro- fitted or removed during normal servicing of the munition (121).
L'invention concerne des dispositifs de perforation pour atténuer la réaction explosive d'un boîtier, corps tubulaire ou contenant, en particulier une munition, lorsqu'il est soumis à une menace dangereuse thermique externe. Les dispositifs se basent sur l'utilisation d'alliages à mémoire de forme. Le dispositif comprend un élément d'alliage à mémoire de forme qui est réuni à un connecteur pour former un anneau, qui peut être situé sur une surface extérieure d'une douille de munitions ou lanceur de minutions de telle sorte qu'un chauffage à travers sa plage de température de transition amènera l'anneau à se contracter radialement vers l'intérieur, perforant ainsi la munition, permettant à une quelconque accumulation de pression d'être relâchée rapidement. Avantageusement, le connecteur est inversible de telle sorte que le dispositif sera capable d'être modernisé ou retiré pendant une utilisation normale de la munition.
Cook John
Kaddour Abdul-Salam
Fetherstonhaugh & Co.
Qinetiq Limited
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