Abstract: The invention relates to an improved suction and blowing machine comprising an impeller provided with blades which rotate internally of an annular channel afforded in a body. The annular channel comprises a first tract having a transversal section which is greater than that of the blades, and is constituted by two communicating semichannels. The annular channel extends from an intake mouth to a delivery mouth and is provided with a peripheral wall facing external peripheral edges of the blades which peripheral wall bears a cusp-section projecting element extending over an entire length of the first tract of the peripheral wall and creates thereon two concave surfaces.

Abstract: A handrail including one or more tubular members, the ends whereof are provided with respective fastening members. Inserts made of photoluminescent material are arranged between the tubular members and the fixing members and are suitable to make the handrail visible even in poor lighting conditions or in complete darkness.