Crane with self-raising mast

Details Crane with self-raising mast Crane with self-raising mast

B - Operations, Transporting

66

C

B66C 23/34 (2006.01) B66C 23/82 (2006.01)

Patent

CA 2418305

An apparatus and method of self-raising a mast for a crane having an upper works rotatably mounted on a lower works and a boom pivotally mounted on the upper works, the boom being supported by boom hoist rigging and a mast pivotally connected to the upper works. The crane further includes a self- raising mast assembly for controlling the position of the mast when the mast is not connected to the boom and is not supportable by the boom hoist rigging. The self- raising mast assembly comprises a mast raising yoke pivotally connected to the upper works, a hydraulic mast raise cylinder pivotally connected between the upper works and the mast raising yoke, and a hydraulic system for controlling the mast raise cylinder.

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