Surgical instrument including a decoupling mechanism

A surgical instrument comprising:

• a shaft assembly including a tubular shaft defining a lumen therethrough, the tubular shaft defining a slot;
• a decoupling mechanism movably disposed within the lumen of the tubular shaft, the decoupling mechanism including:
• a driver coupling having a housing defining a bore, an aperture in communication with the bore, and slots, the housing including a tab on an outer surface thereof;
• an overstroke sled including bosses configured to slidably engage the slots of the driver coupling;
• a proximal driver threadably coupled to the overstroke sled;
• and
• a distal driver coupled to the housing of the driver coupling for concomitant axial displacement therewith;
• and
• a loading unit including a drive assembly configure for axial displacement along a length of the loading unit, the drive assembly coupled to the distal driver such that the distal driver of the decoupling mechanism imparts axial displacement to the drive assembly,
• wherein the decoupling mechanism is transitionable between a first state, in which, rotation of the proximal driver of the decoupling mechanism advances the overstroke sled with the driver coupling, thereby advancing the drive assembly, and a second state, in which, rotation of the proximal driver disengages the overstroke sled from the driver coupling to enable rotation of the overstroke sled relative to the driver coupling.