A screw vacuum pump, in particular for compression against atmospheric pressure, comprises a pump housing defining a suction chamber. As one example, an apparatus for flexible visibility in an integrated circuit is disclosed. The power transmission device then performs normal power transmission. A latch input is coupled to the latch so that a movement of the input moves the latch to the released position. The inventive ultraviolet -curable polyurethane compositions may find use in or as coatings, adhesives, sealants, elastomers and the like.