Hydraulic and earth engineering – Marine vessel portage – launching – or removing – Lifting
Patent
1997-08-25
1999-03-30
Taylor, Dennis L.
Hydraulic and earth engineering
Marine vessel portage, launching, or removing
Lifting
114 44, 405 7, B63C 306, B63C 100
Patent
active
058880194
ABSTRACT:
A walking hoist has a pair of elongated parallel laterally spaced side members with opposite ends. A downwardly extending leg with upper and lower ends is rigidly secured to the ends of each side member. A pair of U-shaped crank members are rotatably secured to and extend between adjacent ends of the side members. The U-shaped cranks each have a bearing member secured to the upper ends of the legs. The crank arms are secured to the bearings and extend radially therefrom in a parallel direction and terminate in an outer end. A horizontal shaft extends between pairs of said crank arms at each end of the legs of the side members. The crank arms are longer than the legs. A circular drive disk is rigidly and operatively secured to the lower ends of the crank arms adjacent the opposite ends of at least one of the side members. A rotational drive assembly is operatively connected to the drive disk to rotate the drive disk in unison in the same direction. A load supporting frame extends upwardly between the horizontal shafts of the cranks and is rotatably secured to the horizontal shafts.
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