Retractable boom assembly in apparatus for towing an...

Details Retractable boom assembly in apparatus for towing an... Retractable boom assembly in apparatus for towing an...

B - Operations, Transporting

63

B

114/46.6

B63B 21/66 (2006.01) B63B 27/16 (2006.01)

Patent

CA 1120790

ABSTRACT OF THE DISCLOSURE A boom system is provided for a hoist and retractable boom assembly for towing a towed body. The boom sub-assembly includes an inner boom and an outer boom. The outer boom is connected to the inner boom by one or more hydraulic cylinders. By introducing fluid into either the head or rod ends of these cylinders, the outer boom is made to telescope outwardly from the inner boom for normal towing, or to collapse into the inner boom, thereby creating a compact stowed combina- tion of boom and towed body. In addition, two shock absorbing/motion attenuating systems are used, which are capable of being used together to provide passive bobbing motion of the boom to minimize variations in the tension of the tow line.

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