US Patent 11678870 Manual drive function for surgical tools

A surgical tool comprising a drive housing having a first end and a second end, a spline extending between the first and second ends, a carriage provided in the drive housing and movable between the first and second ends, and a mechanism for manually actuating the spline. The mechanism may be arranged at the first or second end of the drive housing. The mechanism may further include a frame, a spline coupling rotatably mounted to the frame to receive an end of the spline, and a ring gear rotatable about the frame and operatively coupled to a pinion gear attached to the spline coupling such that rotation of the ring gear about the frame correspondingly actuates the spline.