Patent ID: 7967552
Filing Date: 2011-06-28
Classification: B05B,Y10S

Abstract:
1. A rotary atomiser drive spindle for use as part of a rotary atomiser, the drive spindle comprising a shaft which carries a turbine and a body which comprises at least one supply channel for supplying gas to the turbine for rotatingly driving the shaft relative to the body, wherein the turbine comprises a rotor body portion, which is one of disc shaped and ring shaped, and a plurality of blades projecting from a generally flat surface of the rotor body portion with generally radial gas paths through the turbine being defined by adjacent pairs of blades and in which the at least one supply channel comprises a nozzle portion from which, in use, gas leaves the body of the spindle towards the turbine, the nozzle comprising an outlet and the cross sectional area of the gas passage through the nozzle portion decreasing monotonically from the inlet of the nozzle to the outlet, wherein the turbine comprises at least one surface feature to help reduce losses, wherein each blade is provided with one of a generally axial aperture and a blind recess which extends generally axially, and wherein the outlet of the nozzle is arranged to feed gas to a plurality of said generally radial gas paths through the turbine simultaneously.