Reusable, spring driven autoinjector
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United States of America Patent
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Jun 3, 2008
Grant Date -
Jan 29, 2004
app pub date -
Jun 24, 2003
filing date -
Jun 24, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a reusable spring driven autoinjector. The drive mechanism of the autoinjector of the present invention includes one or more drive springs formed of a shape memory alloy. Therefore, by alternating the shape memory alloy forming the one or more drive springs between austenite phase before an injection and a martensite phase after injection, the reusable autoinjector of the present invention is capable of providing an injection force that is higher than the compressive force required to cock the drive mechanism in preparation for a subsequent injection operation.
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