Surgical end effectors

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

• a drive assembly including a cylindrical body, a first helical groove encircling a portion of the cylindrical body in a first direction, and a second helical groove encircling a portion of the cylindrical body in a second direction, the first direction being opposite from the second direction;
• a driver disposed in mechanical cooperation with the drive assembly and including a longitudinal slot, wherein rotation of the drive assembly in a first direction causes distal translation of the driver relative to the drive assembly;
• a pin extending through the longitudinal slot in the driver;
• and
• a suture disposed in mechanical cooperation with the drive assembly.

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

• a drive assembly configured for rotation about a longitudinal axis and including a first helical groove and a second helical groove, the first helical groove encircling at least a portion of the drive assembly in a first direction, the second helical groove encircling at least a portion of the drive assembly in a second direction, the first direction being opposite from the second direction;
• a driver disposed in mechanical cooperation with the drive assembly, wherein rotation of the drive assembly in a first direction causes distal translation of the driver with respect to the drive assembly;
• a pin disposed distally of the drive assembly, the pin extending through at least one longitudinal slot of the driver;
• a needle assembly disposed in mechanical cooperation with the driver and including a first needle extending distally from a needle block and a second needle extending distally from the needle block, the first needle being parallel to the second needle, wherein distal translation of the driver causes a corresponding distal translation of the needle assembly;
• and
• a follower configured to engage the first helical groove of the drive assembly, wherein when the follower is engaged with the first helical groove, rotation of the drive assembly in the first direction causes distal translation of the follower with respect to the drive assembly.