Patent ID: 7437924

Claim:
A wind vane device ( 1 ), comprising: a horizontal portion ( 10 ), having a plurality of blades ( 35 ) provided at an end of the horizontal portion ( 10 ) to swing the horizontal portion ( 10 ) freely according to the wind direction, a vertical portion ( 20 ), one end of which being fixed to the bottom of the horizontal portion ( 10 ), the other end extending downwardly, a supporting frame ( 40 ), supporting the horizontal portion ( 10 ) at the lower side of the vertical portion ( 20 ), wherein the vertical portion ( 20 ) is a cylindrical structure and has a plurality of radial partitioning walls ( 21 , 21 ′) at inner side in the axial direction; an upright shaft ( 50 ) for housing an axle ( 51 ) with threaded portions at both ends, one end of the axle ( 51 ) is fastened to the center of the partitioning wall ( 21 ) and the other end of the axle ( 51 ) is provided with a pair of bearings ( 52 , 52 ′), a bearing sleeve ( 53 ) being put around the outside of the pair of bearing ( 52 , 52 ′), the supporting frame ( 40 ) consisting of several support rods ( 42 , 43 , 44 ) in which connectors ( 45 , 45 ′) are used for the connection between two adjacent support rods to form a structure enabling the assembling/disassembling, and the upper end of the top-section support rod ( 44 ) being engaged at the outside of the bearing sleeve ( 53 ).