CIRCULAR STAPLER WITH SELECTABLE MOTORIZED AND MANUAL CONTROL

1 . An apparatus for stapling tissue, the apparatus comprising:

(a) a stapling head assembly;

(b) a shaft assembly coupled to the stapling head assembly; and

(c) a handle assembly coupled to the shaft assembly, wherein the handle assembly comprises:

(i) a motor positioned within a motor housing,

(ii) a motor housing positioner coupled to a proximal end of the motor housing, wherein the motor housing positioner is configured to translate between a proximal position and a distal position, and

(iii) a selection assembly, wherein the selection assembly is operable to select between a motorized operation of the stapling head assembly or a manual operation of the stapling head assembly based on the position of the motor housing positioner.

2 . The apparatus of claim 1 , wherein the motor housing positioner comprises a rotation knob.

3 . The apparatus of claim 2 , wherein the rotation knob comprises splines extending distally, wherein the handle assembly comprises a housing, wherein the housing comprises teeth corresponding with the splines, wherein the splines are configured to engage the teeth during motorized operation such that the rotation knob is prevented from rotating.

4 . The apparatus of claim 1 , wherein the selection assembly is configured to select the motorized operation when the motor housing positioner is in the distal position, wherein the selection assembly is configured to select the manual operation when the motor housing positioned is in the proximal position.

5 . The apparatus of claim 1 , wherein the handle assembly further comprises a battery.

6 . The apparatus of claim 5 , wherein the battery is operable to supply power to the motor during motorized operation.

7 . The apparatus of claim 6 further comprising spring contacts, wherein the spring contacts are operable to supply power from the battery to the motor based on the position of the motor housing positioner.

8 . The apparatus of claim 1 , wherein the selection assembly comprises a first gear and a second gear, wherein the first gear is coupled to the motor housing, wherein the second gear comprises splines.

9 . The apparatus of claim 8 , wherein the first gear is configured to engage the splines of the second gear during manual operation.

10 . The apparatus of claim 8 , wherein the first gear is configured to be decoupled from the splines of the second gear during motorized operation.

11 . The apparatus of claim 1 , wherein the shaft assembly comprises a driver actuator, wherein the driver actuator is operable to actuate the stapling head assembly.

12 . The apparatus of claim 11 , wherein the motor is operable to actuate the driver actuator during motorized operation.

13 . The apparatus of claim 11 , wherein the motor housing positioner is operable to actuate the driver actuator during manual operation.

14 . The apparatus of claim 11 , wherein the handle assembly comprises a firing ring, wherein the firing is operable to translate the driver actuator.

15 . The apparatus of claim 14 , wherein the handle assembly comprises slots, wherein the handle assembly comprises a coupling member extending through the slots to couple with the firing ring, wherein the coupling member is configured to translate through the slots to lock the longitudinal position of the firing ring.

16 . An apparatus for stapling tissue, the apparatus comprising:

(a) a closure assembly operable to clamp tissue between an anvil and a stapling head assembly;

(b) a firing assembly operable to drive a knife and at least one staple through tissue from the stapling head assembly toward the anvil; and

(c) a drive assembly, wherein the drive assembly comprises:

(i) a motor,

(ii) a pivoting member coupled to the motor,

(iii) a firing rod, wherein the firing rod is operable to actuate the firing system, and

(iv) a closure rod, wherein the closure rod is operable to actuate the closure system;

wherein the pivoting member is configured selectively switch between engaging either the firing rod or the closure rod such that the motor is operable to actuate the firing rod when the pivoting member is engaged with the firing rod and the motor is operable to actuate the closure rod when the pivoting member is engaged with the closure rod.

17 . The apparatus of claim 16 , wherein the drive assembly comprises a solenoid, wherein the solenoid is operable to pivot the pivoting member between engaging the firing rod and the closure rod.

18 . An apparatus for stapling tissue, the apparatus comprising:

(a) a stapling head assembly;

(b) a shaft assembly coupled to the stapling head assembly; and

(c) a handle assembly coupled to the shaft assembly, wherein the handle assembly comprises:

(i) a motor, wherein the motor is operable to actuate the stapling head assembly in a motorized operational mode,

(ii) a rotation knob, wherein the rotation knob is configured to translate between a first position and a second position, wherein the rotation knob is operable to actuate the stapling head assembly in a manual operational mode, and

(iii) a selection assembly, wherein the selection assembly is operable to provide the motorized operational mode when the rotation knob is in the first position, wherein the selection assembly is operable to provide the manual operational mode when the rotation knob is in the second position.

19 . The apparatus of claim 18 , wherein the first position of the rotation knob is a distal position, wherein the second position of the rotation knob is a proximal position.

20 . The apparatus of claim 18 , wherein the stapling head assembly is coupleable to an anvil, wherein the stapling head assembly is operable to clamp tissue between the anvil and the stapling head assembly, wherein the stapling head assembly comprises a knife and a plurality of staples aligned in a circular configuration, wherein the stapling head assembly is operable to drive the knife and the staples through tissue from the stapling head assembly toward the anvil.