Arrangement for locking arming conditions
AssigneeSaab AB
InventorsBengt Andersson, Per Karlsson, Filip Strand
Life of this patent
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Abstract
An arrangement for locking arming conditions to prevent unintentional arming of SAI-units of ammunition units when the ammunition unit is subjected to external threats. A ring shaped shape memory alloy is provided in cooperation with a recess in a plunger arranged in connection to the SAI-unit and a fixed recess to prevent the plunger from axial movement when subjected to heating by changing the shape of the essentially ring shaped shape memory alloy to lock the plunger relative to the fixed recess.
Claims11
An arrangement for locking arming conditions to prevent unintentional arming of Safety, Arming and Ignition units (SAI-units) of ammunition units when the ammunition unit is subjected to external threats, wherein an essentially ring-shaped shape memory alloy is provided which can assume a locking position to prevent a plunger from moving axially when subjected to heating by changing the shape of the essentially ring-shaped shape memory allowy whereby the essentially ring-shaped shape memory alloy by expansion or contraction becomes partly accommodated in a recess in the plunger and partly accommodated in a fixed recess in a SAI-holder whereby the plunger is locked relative to the fixed recess;
- said plunger being arranged partly in the SAI-unit or built-in in the SAI-unit.
Dependencies are inferred from the claim text.