Multiple firing stroke surgical instrument incorporating electroactive polymer anti-backup mechanism
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United States of America Patent
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-
Apr 7, 2009
Grant Date -
Mar 23, 2006
app pub date -
Jul 14, 2005
filing date -
Jul 28, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A firing member reciprocates within an elongate shaft to the end effector to transfer this firing motion. A retraction spring retracts the firing member after full firing. Between firing strokes as the firing trigger is released, an anti-backup mechanism activates an electrical actuator (e.g., elecroactive polymer actuator) that is physically grounded to the handle to bind the firing member preventing inadvertent retraction.
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Family
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Cited Art Landscape
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