Rotary actuatable closure arrangement for surgical end effector

A surgical tool, comprising:

• an end effector, comprising:
• a first jaw member;
• a second jaw member;
• and
• an I-beam member configured to translate in an axial direction to cam the first jaw member toward the second jaw member, the I-beam member connected to a threaded rotary drive member coupled to a rotary drive nut;
• a shaft assembly proximal to the end effector;
• a rotary drive shaft configured to transmit rotary motions, the rotary drive shaft being selectively moveable between a first position and a second position relative to the shaft assembly, wherein when in the first position, the rotary drive shaft is configured to engage with the rotary drive nut to transmit rotary motions to the rotary drive nut, and wherein rotary motions of the rotary drive nut actuate translation of the threaded rotary drive member and the I-beam in the axial direction, wherein the rotary drive shaft is configured to engage and selectively transmit the rotary motions to the end effector when the rotary drive shaft is in the second position, and wherein the rotary drive shaft is configured to disengage from the rotary drive nut when in the second position;
• and
• a locking mechanism comprising a locking member movably coupled to the rotary drive shaft, wherein the locking member is axially movable with the rotary drive shaft, wherein the locking member is in a third position relative to the shaft assembly when the rotary drive shaft is in the first position, wherein the locking member is in a fourth position relative to the shaft assembly when the rotary drive shaft is in the second position, wherein the rotary drive shaft is rotatable relative to the locking member in the fourth position, wherein the locking member is configured to rotationally lock the end effector to the shaft assembly in the third position, and wherein the locking member is configured to disengage from the end effector in the fourth position.

A surgical tool, comprising:

• a shaft assembly;
• an end effector extending distally from the shaft assembly, the end effector comprising:
• a first jaw member;
• and
• a second jaw member;
• wherein the first jaw member is movable relative to the second jaw member between an open position and a closed position;
• a first actuation mechanism comprising an I-beam member configured to translate in an axial direction to cam the first jaw member toward the second jaw member, the I-beam member connected to a threaded rotary drive member coupled to a rotary drive nut;
• a second actuation mechanism;
• a clutch member configured to selectively engage and transmit rotary motions to either the first or the second actuation mechanism, wherein the clutch member is selectively movable between a first distal position and a first proximal position, wherein the clutch member is configured to engage with the rotary drive nut to transmit the rotary motions to the rotary drive nut, and wherein the rotary motions of the rotary drive nut actuate translation of the threaded rotary drive member and the I-beam in the axial direction, wherein the clutch member is configured to transmit the rotary motions to the second actuation mechanism in the first proximal position to rotate the end effector relative to the shaft assembly;
• and
• a locking mechanism comprising a locking member movably coupled to the clutch member, wherein the locking member is axially movable with the clutch member between a second distal position and a second proximal position, wherein the locking member is in the second distal position when the clutch member is in the first distal position, wherein the locking member is in the second proximal position when the clutch member is in the first proximal position, wherein the clutch member is rotatable relative to the locking member in the second proximal position, wherein the locking member is configured to rotationally lock the end effector to the shaft assembly in the second distal position, and wherein the locking member is configured to disengage from the end effector in the second proximal position.