Actuating bird-wing arrow blade
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United States of America Patent
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Jun 9, 2015
Grant Date -
N/A
app pub date -
Aug 6, 2014
filing date -
Oct 4, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A bird-wing broadhead blade is a blade that has a free end that is positioned in a back or downstream position from a fixed end. The free end of the bird-wing blade extends out, like a bird opens its wings to fly. A bird-wing broadhead blade may incorporate a shape memory alloy material that has a set shape, such as by thermal setting. A shape memory alloy bird-wing broadhead blade may be deformed into a strained shape and retained until hitting an object. When the shape memory blade is released, it will move into the set shape automatically. A shape memory alloy is a metal alloy that “remembers” its set shape and has superelastic properties. A spring deployment system may also be used to deploy one or more bird-wing blades. A spring may be configured upstream or downstream of the fixed end of the blades.
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