Abstract: A sterile unit for the sterile connection of an instrument drive unit to a surgical instrument, including: a base with a circular passageway orifice having a transmission element supported to be rotatable around a rotational axis and axially movable in a direction of the rotational axis in a movement range between first and second end positions. The sterile unit also includes a first fastening mechanism connecting the sterile unit to the instrument drive unit and a second fastening mechanism connecting the sterile unit to the instrument. To improve the coupling between the sterile and instrument drive units, the transmission element has a conical region at a circumferential surface and the passageway orifice has a complementary conical region at a passageway wall. The conical regions are aligned coaxially and contact one another such that a rotation of the transmission element around the rotational axis relative to the base is blocked.

Abstract: A pin assembly adaptable for fastening to the exterior shoulder section of a garment for the detachable retention of a shoulder strap of a bag worn simultaneously with the garment. The assembly is formed of a U-shaped frame to the underside of which a pin is pivotaly mounted, with a hook fixed to the underside of the frame for retention of the end of the pin. A bar is pivotably mounted between the legs of the U-section frame to the frame, with detents on the legs serving to hold the bar in frictional engagement in the closed position of the bar between the frame legs. The bar is mounted at a spaced distance from each of the two frame legs to permit a shoulder strap of a bag to pass over the frame legs and under the bar when the assembly is pinned to the exterior of the shoulder section of a garment worn by the user.