AXIAL FAN Russian patent published in 2011 - IPC F04D19/00 

FIELD: engines and pumps.

SUBSTANCE: axial fan includes the housing, straightener in the form of sleeve with blades, which is installed in it by means of fasteners passing through radial holes of the housing. The above blades contact with their outer surface to inner cylindrical surface of the housing. Fan also includes electric motor with impeller mounted on its shaft and arranged in the sleeve; at that, fasteners are mounted on the housing and contact with radial holes on outer surface of blades, and nominal axial and angular sizes of coordinates of radial holes of the housing coincide with nominal axial and angular sizes of coordinates of radial holes on outer surface of blades respectively; at that, each fastener is made in the form of plank with cylindrical pin perpendicular to its support surface and passing through radial hole of the housing and arranged in radial hole on outer surface; each fastener contacts the support surface of its plank with outer surface of housing and attached to it at least with two threaded parts, and radial holes of the housing have diameter

EFFECT: higher manufacturability.

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