Surgical end effectors

An end effector for use with a surgical device, the end effector comprising:

• a drive assembly;
• a needle assembly disposed in mechanical cooperation with the drive assembly, wherein rotation of the drive assembly in a first direction causes a corresponding rotation of the needle assembly, the needle assembly including a pin;
• a helix assembly disposed in mechanical cooperation with the needle assembly, the helix assembly including a proximal end and a longitudinal slot;
• and
• a biasing element disposed in mechanical cooperation with the needle assembly and configured to bias the needle assembly distally with respect to the drive assembly;
• wherein the needle assembly is movable with respect to the helix assembly from a first position where the pin is out of alignment with the longitudinal slot of the helix assembly, to a second position where the pin is aligned with the longitudinal slot of the helix assembly, to a third position where the pin has been distally translated with respect to the helix assembly.