Transportable crane

B - Operations – Transporting – 66 – C

Patent

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Details

B66C 23/88 (2006.01) B66C 23/42 (2006.01) B66C 23/70 (2006.01) B66F 9/065 (2006.01) B66F 9/24 (2006.01) B66F 11/04 (2006.01)

Patent

CA 2276695

A transportable multi-purpose crane includes a platform having outriggers disposed at opposite ends thereof. A turntable is rotatably mounted to the platform between the outriggers on opposite ends of the platform, and has a center axis of rotation. A riser boom, having a first end and a second end, is pivotally mounted to the turntable at its first end. The riser boom points in a first direction with respect to the center axis of rotation, and is a telescoping boom. An upper boom, having a first end and a second end, has its first end pivotally mounted to the second end of the riser boom. The second end of the upper boom supports a second load carrying device. The upper boom points in a second direction, opposite the first direction, with respect to the center axis of rotation, and is a telescoping boom. By providing the riser boom and the upper boom such that the riser boom serves as a counterweight when the second load carrying device carries a load, the crane does not need a separate counterweight.

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