Surgical stapler with rotary cam drive

A surgical instrument comprising:

• (a) a shaft assembly;
• (b) a stapling assembly extending distally from the shaft assembly, wherein the stapling assembly is configured to drive a plurality of staples into tissue;
• (c) a motor;
• (d) a cam coupled with the motor, wherein the cam includes a distal cam face disposed at a distal end of the cam;
• (e) a firing assembly configured to contact the distal cam face, wherein the motor is configured to rotate the distal cam face to drive the firing assembly distally;
• and
• (f) a resilient member, wherein the resilient member is configured to bias the firing assembly proximally towards the cam.

A surgical instrument comprising:

• (a) a shaft assembly;
• (b) a stapling assembly extending distally from the shaft assembly, wherein the stapling assembly is configured to drive a plurality of staples into tissue;
• (c) a motor;
• (d) a cam configured to be rotated by the motor, wherein the cam includes a distal cam face that is configured to remain longitudinally stationary relative to the motor during rotation of the distal cam face by the motor;
• and
• (e) a firing assembly in mechanical communication with the distal cam face of the cam, wherein the firing assembly is configured to cause a portion of the stapling assembly to longitudinally translate in response to rotation of the distal cam face by the motor to thereby drive the plurality of staples through the tissue.

A surgical instrument comprising:

• (a) a shaft assembly;
• (b) a stapling assembly extending distally from the shaft assembly, wherein the stapling assembly is configured to drive a plurality of staples into tissue;
• (c) a motor;
• (d) a cam coupled with the motor, wherein the cam includes a distal cam face;
• (e) a cam follower that is configured to contact the distal cam face;
• (f) a firing assembly coupled with the cam follower;
• and
• (g) a resilient member, wherein the firing assembly and the cam follower are translatable to actuate a movable portion of the stapling assembly distally and proximally in response to a single revolution of the distal cam face by the motor and the resilient member proximally biasing the firing assembly toward the cam.