Abstract: An inlet nozzle (1) for a radial, diagonal or axial-flow fan, comprising an inlet section (3) that is circular in cross-section, has a radius of curvature, and tapers in diameter in the direction of flow (4), characterized by the presence of a measure or a flow element on or in the curved surface (5) of the inlet section for the purpose of forcing turbulent boundary layers in the flow, which can counteract a stall in this region. A radial, diagonal or axial-flow fan comprises a corresponding inlet nozzle (1).

Abstract: An inlet nozzle (1) for a radial, diagonal or axial-flow fan, comprising an inlet section (3) that is circular in cross-section, has a radius of curvature, and tapers in diameter in the direction of flow (4), characterized by the presence of a measure or a flow element on or in the curved surface (5) of the inlet section for the purpose of forcing turbulent boundary layers in the flow, which can counteract a stall in this region. A radial, diagonal or axial-flow fan comprises a corresponding inlet nozzle (1).

Abstract: A disc brake has a driven adjusting mechanism with a thrust shaft. A drive element of the adjusting mechanism is coupled to the thrust shaft in a manner such that the drive element and thrust shaft are mutually irrotational but are axially movable with respect to each other. A coupling is provided between the drive element and thrust shaft so that they can mutually move translationally in each of two directions, which directions are perpendicular to the longitudinal axis of the thrust shaft. In this way, the adjustment of the brake is rendered insensitive to vibrations and oscillations, and to fluctuations due to manufacturing tolerances and assembly deviations. The process of assembly of the brake is also made simpler and easier.