Ultrasonic surgical instrument

An ultrasonic surgical instrument, comprising:

• a handpiece;
• a lever operably coupled to the handpiece and movable between first, second, and third positions;
• a shaft assembly extending distally from the handpiece;
• an ultrasonic waveguide extending through the shaft assembly and defining a fixed jaw member at a distal portion thereof;
• a movable jaw member disposed towards a distal portion of the shaft assembly and operably coupled to the lever such that movement of the lever between the first, second, and third positions moves the movable jaw member relative to the fixed jaw member between a retracted position, wherein the movable jaw member is retracted relative to the fixed jaw member, an extended open position, wherein the movable jaw member opposes and is spaced-apart from the fixed jaw member, and an extended closed position, wherein the movable jaw member opposes and is approximated relative to the fixed jaw member.