| 主权项 |
1. A surgical instrument, comprising:
a housing including an elongated shaft having a distal portion extending therefrom and a proximal portion coupled to the housing, the elongated shaft having a longitudinal axis defined therethrough; a stationary actuation member axially disposed within the elongated shaft, the stationary actuation member including a cam pin mechanically coupled to the distal portion of the elongated shaft; an actuating mechanism operably coupled to the proximal portion of the elongated shaft and moveable relative to the housing between an actuated position and an unactuated position to selectively move the elongated shaft along the longitudinal axis relative to the stationary actuation member; an end effector including a pair of opposing first and second jaw members operably coupled about a common pivot such that at least one of the jaw members is movable relative to the other jaw member from a first position wherein the jaw members are disposed in spaced relation relative to one another to a second position wherein the jaw members cooperate to grasp tissue therebetween, at least one of the first and second jaw members including a camming slot configured to engage the cam pin to move the at least one movable jaw member between the first position and the second position upon movement of the elongated shaft along the longitudinal axis; at least one drive surface disposed on the actuating mechanism and configured to compress a spring upon movement of the actuating mechanism to the actuated position, wherein the spring imparts a spring force in a distal direction to bias the actuating mechanism to the unactuated position; an electrically conductive tissue sealing surface extending along a length of at least one jaw member, the tissue sealing surface adapted to connect to a source of electrosurgical energy for conducting electrosurgical energy through tissue grasped therebetween to effect a tissue seal; and a knife blade supported in the elongated shaft and moveable in a longitudinal direction through a knife channel defined along a length of at least one of the jaw members to cut tissue disposed between the jaw members. |
