#$%^&*AU2005203222B220110630.pdf#####MULTIPLE FIRING STROKE SURGICAL INSTRUMENT INCORPORATING ELECTROACTIVE POLYMER ANTI-BACKUP MECHANISM Abstract of the Invention A surgical stapling and severing instrument particularly suited to endoscopic procedures incorporates a handle that produces separate closing and firing motions to actuate an end effector. In particular, the handle produces multiple firing strokes in order to reduce the required amount of force required to fire (i.e., staple and sever) the end effector. A firing member reciprocates within an elongate shaft to the end effector to transfer this firing motion. A retraction spring retracts the firing member after full firing. Between firing strokes as the firing trigger is released, an anti-backup mechanism activates an electrical actuator (e.g., elecroactive polymer actuator) that is physically grounded to the handle to bind the firing member preventing inadvertent retraction.0 0 0 1n r
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机译：＃$％^＆* AU2005203222B220110630.pdf #####多冲程外科手术器械引入电聚合物抗备份机制发明摘要一种特别适合于内窥镜的外科缝合和切断器械程序包含一个手柄，可产生独立的关闭动作和击发动作来促动末端执行器。特别是，手柄产生多个击发行程，以减少发射（即装订和切断）末端执行器所需的力的大小。射击部件在细长轴内往复运动至末端执行器以传递该击发运动。完全发射后，一个缩回弹簧使发射构件缩回。在击发之间释放触发扳机，防后退机构激活电动执行器（例如，电活性聚合物致动器），物理接地到手柄以约束击发防止意外回缩。0 0 01n r
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