Patent ID: 8123207

Claim:
A lifting tool for a nacelle to be coupled to a wind generator which comprises: a rotating ring ( 2 ) supported on a tower ( 3 ); a nacelle ( 1 ), supporting the shaft of a hub ( 5 ); wherein the lifting tool comprises: a plurality of beams ( 12 ) fixed to a plurality of points distributed on an internal surface of the tower ( 3 ) forming a horizontal polygon; a plurality of supports ( 13 ) secured to the beams ( 12 ) in the vertices of the polygon as braces; a plurality of front and rear lifting means configured to be fixed to the supports ( 13 ); first nacelle ( 1 ) fixing means aligned vertically with the front lifting means and located at a higher level than the front lifting means; second nacelle ( 1 ) fixing means aligned vertically with the rear lifting means and located at a higher level than the front lifting means; and first and second fixing means moving in a vertical direction by the front and rear lifting means, in order to move the nacelle ( 1 ) in said vertical direction.