Tower crane

Details Tower crane Tower crane

B - Operations, Transporting

66

C

212/27

B66C 23/62 (2006.01) B66C 23/26 (2006.01) B66C 23/82 (2006.01)

Patent

CA 1041047

ABSTRACT OF THE DISCLOSURE A tower crane is disclosed in which a balance arm is pivotally connected to the top of the tower on an axis midway between the front edge of the tower and the rear edge thereof. The front end of the balance arm ex- tends beyond the front edge of the tower, and means to support a load, such as a boom or a sheave, is connected to said front end of the arm. A backstay exerts a downward force on the rear end of the balance arm to balance the load. The load carried by the boom or sheave is therefore distributed equally to the four corner chords of the tower. -1a-

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