Handheld electromechanical surgical system

A handheld electromechanical surgical system configured for selective connection with a surgical reload in order to actuate the surgical reload to perform at least one function, the surgical reload including an annular staple pusher for firing an annular array of staples thereof, and a circular knife carrier for translating an annular knife independently of the staple pusher;

• the surgical system comprising:
• a handheld electromechanical surgical device including:
• a device housing;
• and
• at least one rotatable drive shaft supported in and projecting from the device housing;
• and
• an adapter assembly selectively connectable between the housing of the surgical device and the surgical reload, the adapter assembly comprising:
• an adapter housing configured and adapted for connection with the surgical device and to be in operative communication with each rotatable drive shaft of the surgical device;
• an outer tube having a proximal end supported by the adapter housing and a distal end configured and adapted for connection with the surgical reload, wherein the distal end of the outer tube is in operative communication with each of the annular staple pusher and the circular knife carrier of the surgical reload;
• a trocar assembly releasably supported within the outer tube, the trocar assembly including a trocar member threadably supported on a distal end of a trocar drive screw;
• a trocar assembly release mechanism supported on and accessible through the outer tube, the trocar assembly release mechanism including an unactuated condition for operatively securing the trocar assembly within the outer tube, and an actuated condition for operatively releasing the trocar assembly and permitting release of the trocar assembly from within the outer tube;
• and
• a first force/rotation transmitting/converting assembly for interconnecting a respective one drive shaft of the surgical device and the trocar drive screw of the trocar assembly, wherein the first force/rotation transmitting/converting assembly includes:
• a first proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device;
• and
• a first distal force transmitting member that is connected to the trocar drive screw of the trocar assembly, the first distal force transmitting member being non-rotatably connected to the first proximal rotation receiving member;
• at least a second force/rotation transmitting/converting assembly for interconnecting a respective one drive shaft of the surgical device and a respective one of the annular staple pusher and the circular knife carrier of the surgical reload, wherein:
• the second force/rotation transmitting/converting assembly includes:
• a second proximal rotation receiving member that is connectable to a respective rotatable drive shaft of the surgical device;
• and
• a second distal force transmitting member that is connectable to the respective one of the annular staple pusher and the circular knife carrier of the surgical reload, the second distal force transmitting member being connected to the second proximal rotation receiving member in such a manner whereby rotation of the second proximal rotation receiving member is converted to axial translation of the second distal force transmitting member, and in turn, axial translation of the respective one of the annular staple pusher and the circular knife carrier of the surgical reload.