CRAIG V. KRASTINS,JAMES D. ALLEN, IV,JESSICA E.C. OLSON,JASON G. WEIHE
申请号：
US14719422
公开号：
US20160338762A1
申请日:
2015.05.22
申请国别(地区):
US
年份:
2016
代理人:
摘要：
A surgical instrument includes a housing, a shaft extending therefrom, an end effector assembly supported by the shaft, a movable handle, and a drive assembly. The drive assembly includes a translatable drive member for actuating the end effector assembly, and a torsion spring including first and second legs. The first leg is configured to translate through the housing in response to movement of the movable handle relative to the housing. The second leg is configured to translate through the housing in cooperation with the first leg to move the drive member longitudinally when a force acting on the drive member is less than a threshold force, and to remain in fixed position, thereby tensioning the torsion spring and retaining the drive member in fixed position when the force acting on the drive member is equal to or exceeds the threshold force.
