Patent ID: 7681747

Claim:
A crane for installing a window in a window opening in a building, comprising: a strut; a head plate at one end of the strut; a foot plate at the other end of the strut; the strut being extendable to press the head and toe plates against opposing top and bottom surfaces of the opening; a boom, pivoted at one end to the strut; a winch, mounted on the strut, around which a hoisting cable can be wound, the hoisting cable extending from the winch, over a first pulley at an upper region of the strut, over a second pulley mounted on the boom between the strut and the distal end of the boom, over a third pulley at the distal end of the boom and to a load engagement point, such that when a load is fully hoisted to the distal end of the boom, further winding of the winch draws the boom towards the strut so that the window can be located in its final position without removing the crane from the window opening.