Patent ID: 8651462

Claim:
A lift construction for lifting and lowering a blade ( 2 ) of a windmill to and from its mounted position at a rotatable cone ( 7 ) of the windmill, wherein a yoke is mountable in said cone, characterized in that it comprises two yokes: a first yoke ( 1 ) of said two yokes mountable to opposing sides at the inside of the blade ( 9 ), and a second yoke ( 8 ) of said two yokes mountable in the cone ( 7 ) of the windmill, wherein the first yoke ( 1 ) and the second yoke ( 8 ) are arranged to cooperate, wherein the first yoke ( 1 ) and the second yoke ( 8 ) have cooperating hoisting means ( 10 , 9 ′) that are provided at ends of the yokes which, when in use, are distant from a standard of the windmill, wherein the hoisting means comprise a winch ( 9 ′, 9 ″) and one of a block ( 10 ) or pad eye, and wherein one of the first yoke ( 1 ) or the second yoke ( 8 ) has a receptacle ( 11 ) and the other of the first yoke ( 1 ) and the second yoke ( 8 ) has an actuator ( 12 ) near to the ends of the yokes ( 1 , 8 ) which, when in use, are closest to the windmill's standard to cooperatively position the yokes and maintain a predefined alignment and/or distance between the ends of the yokes ( 1 , 8 ).