Bistable microvalve and microcatheter system
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United States of America Patent
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May 20, 2003
Grant Date -
Jan 31, 2002
app pub date -
Mar 8, 2001
filing date -
Mar 9, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A bistable microvalve of shape memory material is operatively connected to a microcatheter. The bistable microvalve includes a tip that can be closed off until it is in the desired position. Once it is in position it can opened and closed. The system uses heat and pressure to open and close the microvalve. The shape memory material will change stiffness and shape when heated above a transition temperature. The shape memory material is adapted to move from a first shape to a second shape, either open or closed, where it can perform a desired function.
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