Abstract: In a power-assisted steering system or power steering system having an electric motor, which drives a worm gear mechanism that has a composite gear wheel in the form of a worm wheel, the worm wheel includes a ring gear connectible to a hub via a first disk, and an annular projection of the first disk axially engages with the ring gear. In order to improve the centering of the component parts of the composite gear wheel in the tangential direction, and in order to render the power transmission in the gear wheel uniform, the annular projection on the first disk is provided with one or more depressions in the axial direction to form tooth-like projections, which form a drive-type toothed section and engage with depressions on an axial side face of the ring gear.

Abstract: In a power-assisted steering system or power steering system having an electric motor, which drives a worm gear mechanism that has a composite gear wheel in the form of a worm wheel, the worm wheel includes a ring gear connectible to a hub via a first disk, and an annular projection of the first disk axially engages with the ring gear. In order to improve the centering of the component parts of the composite gear wheel in the tangential direction, and in order to render the power transmission in the gear wheel uniform, the annular projection on the first disk is provided with one or more depressions in the axial direction to form tooth-like projections, which form a drive-type toothed section and engage with depressions on an axial side face of the ring gear.

Abstract: An arrangement is disclosed for distributing and supplying and removing a coolant to and from a wall of a turbine engine, in particular a turbine dynamic jet engine, which is subjected to the flow of a hot fluid and has cooling channels which can be acted upon by the coolant and which are arranged substantially parallel to one another in the wall. The arrangement includes tube guides which are spatially separated from one another and connected to the wall, a casing of each tube guide having a longitudinal slot, each tube guide being attached on an inlet or outlet side to the respective cooling channels by way of the longitudinal slot and apertures in the wall, and a soldering or welded seam connecting the tube guides to the wall along the respective longitudinal slot.