Manual drive functions for surgical tool having carriage architecture

A surgical tool, comprising:

• a drive housing having opposing first and second ends;
• a spline extending between the first and second ends and being rotatably coupled to a drive input at the first end;
• a drive gear mounted on and rotatable with the spline;
• a carriage movably mounted to the spline and housing an activating mechanism operatively coupled to the drive gear such that rotation of the spline actuates the activating mechanism;
• a manual drive gear provided on a proximal end of the spline and rotatable with the spline;
• and
• a bailout mechanism arranged at the second end and including:
• a lever arranged at the second end and engageable with the manual drive gear;
• and
• a removable cover provided on the second end of the drive housing to enclose the lever and having a spacer bar positionable beneath the lever to support the lever in a first position, where the manual drive gear is disengaged from the lever and freely rotatable relative to the lever,
• wherein, upon removal of the spacer bar from beneath the lever, the lever is movable to a second position, where the lever engages the manual driver gear such that rotation of the lever correspondingly rotates the spline.

A surgical tool, comprising:

• a drive housing having opposing first and second ends;
• a spline extending between the first and second ends and being rotatably coupled a drive input at the first end;
• a drive gear coupled to and rotatable with the spline;
• a carriage movably mounted to the spline and housing an activating mechanism operatively coupled to the drive gear such that rotation of the spline actuates the activating mechanism;
• a manual drive gear provided on a proximal end of the spline and rotatable with the spline;
• an end cap provided at the second end with the spline extending through the end cap;
• and
• a bailout mechanism arranged at the second end and including:
• a lever provided on the proximal end of the spline and having a bore within which the manual drive gear is arranged, the bore comprising a first bore section, within which the manual drive gear is freely rotatable relative to the lever, and a second bore section, within which the manual drive gear is rotatable with the lever, wherein the lever is movable relative to the manual drive gear between a first position, where the manual drive gear is oriented in first bore section and thus disengaged from and rotatable relative to the lever, and a second position, where the manual drive gear is oriented in second bore section and thus engaged and rotatable with lever;
• a biasing element arranged to urge the lever towards the second position;
• and
• a removable cover mountable on the end cap to enclose the lever and having a retaining pin positioned within an interior of the removable cover such that, when the removable cover is mounted on the end cap, the retaining pin contacts the lever to thereby maintain the lever in the first position with the manual drive gear oriented in the first bore section, wherein, as the removable cover is removed causing the retaining pin to move away from the lever, the biasing element pushes the lever in a direction towards the second position to thereby orient the manual drive gear within the second bore section where the manual drive gear is rotatable with the lever.