Patent ID: 8137065

Claim:
An aerogenerator, comprising: a support pillar placed upright on ground, the support pillar having a hollow space therein, with a support extension extending a predetermined distance from an upper end of the support pillar inwards such that the hollow space is open on the upper end of the support pillar through a center of the support extension; a rotational support unit rotatably mounted on the upper end of the support pillar, the rotational support unit including a rotational body having a space therein, and a rotational support base supporting a lower end of the rotational body and having opposite ends extending predetermined lengths from the rotational body outwards; a vane unit including a main vane and a subsidiary vane provided on the respective opposite ends of the rotational support base of*the rotational support unit, the main vane and the subsidiary vane being rotatable by wind and having different weights; a generating unit to convert rotating force transmitted from the vane unit into electric energy; a rotating force transmission unit to transmit the rotating force of the vane unit to the generating unit; and horizontal maintaining means for connecting the vane unit to the rotational body to maintain in a horizontal orientation a central axis of a rotating shaft of the vane unit, wherein the rotational support base of the rotational support unit is bent upwards, so that when the rotational body and the vane unit are coupled to the rotational support base, the rotational support base supports the weight of the vane unit such that the central axis of the rotating shaft of the vane unit is maintained in a horizontal orientation, wherein the rotational support base is constructed such that bending rates of the opposite ends thereof differ from each other, based on a medial portion of the rotational support base on which the rotational body is provided, and wherein a bending rate of one end of the rotational support base which supports thereon the main vane which is heavier than the subsidiary vane is greater than a bending rate of a remaining end of the rotational support base which supports the subsidiary vane.