Abstract: A surgical instrument includes an elongate shaft, a proximal clevis on the distal end of the shaft, a distal clevis coupled to the proximal clevis, and an end effector assembly. The distal clevis includes a proximally extending portion and a pair of bosses in fixed positions on the proximally extending portion. A first pin couples the end effector assembly to the distal clevis. A second pin, which has an axis perpendicular to the axis of the first pin, extends through the bosses to couple the proximal and distal clevises. Tendons extend from the end effector assembly around pulleys disposed on the bosses and through the shaft.

Abstract: A surgical instrument for use with a robotic manipulator includes an end effector assembly having one or two end effector members, each having a distal treatment end, a proximal end, and a tendon pass-through. Each end effector member is sandwiched between a corresponding pair of pulley members that, when assembled define an annular tendon pathway that is between the pulley members and that is aligned with the pass-through. For each end effector member, a tendon having a distal loop portion ends through the tendon pass-through, with its legs passing proximally from the pass-through, extending in opposite directions around the tendon pathway and proximally through the instrument's shaft.

Abstract: A surgical instrument for use with a robotic manipulator includes an end effector assembly having one or two end effector members, each having a distal treatment end, a proximal end, and a tendon pass-through. Each end effector member is sandwiched between a corresponding pair of pulley members that, when assembled define an annular tendon pathway that is between the pulley members and that is aligned with the pass-through. For each end effector member, a tendon having a distal loop portion ends through the tendon pass-through, with its legs passing proximally from the pass-through, extending in opposite directions around the tendon pathway and proximally through the instrument's shaft.