B - Operations – Transporting – 66 – C
Patent
B - Operations, Transporting
66
C
254/19
B66C 23/36 (2006.01) B66C 23/78 (2006.01)
Patent
CA 1163261
TRUCK CRANE ABSTRACT OF THE DISCLOSURE A mobile truck crane having an elongated main frame that forms the carriage for the crane as well as forming a fore and aft elongated outrigger for stabilization in the crane operative position. A pair of transversely swingable out- riggers are attached intermediate the length of the main frame and act to stabilize the crane in transverse directions. The main frame is formed of rectangular tubular cross section and is of such shape as to have a high strength-to-weight ratio and which is particularly rigid and capable of tran- smitting high, concentrated loads in an efficient manner from a revolvable upper that includes a telescoping boom. The main frame includes an intermediate tub which is fabricated to transmit loads from the upper superstructure to all four outriggers of the main frame. The crane finds particularly utility when used as a mobile truck crane of the self-propelled type in which the power source is located on the upper, revolvable superstructure and which provides power through a right angle drive downwardly through the tub and to a power transmission located at the underside of the main frame for furnishing driving power to the ground engaging wheels. The superstructure of the crane includes a cantilevered frame- work overhanging one side of the superstructure and on which are mounted essential parts of the crane, such as the engine, air and fuel tanks, compressor, winches, and conventional counterweights are not required for counterbalancing the telescoping boom which extends from a side of the super- structure opposite that of the cantilevered framework.
388140
Kay Christopher G.
Lanning John M.
Harnischfeger Corporation
Smart & Biggar
LandOfFree
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