ROTORVENTILATOR

摘要

The invention disclosed is a rotor ventilator which includes a base to which a shaft is connected to extend upwardly therefrom and a rotor. The rotor is rotatable about the shaft and includes a plate and a plurality of vanes extending downwardly therefrom. Also included is a bearing means for supporting the rotor on the shaft. The bearing means is located at the plate, above the centre of gravity of the rotor.