Traversing hoists – Having horizontally swinging boom or bridge – Having fluid ram directly actuating load cable or sheave...
Patent
1991-05-30
1993-01-19
Sotelo, Jesus D.
Traversing hoists
Having horizontally swinging boom or bridge
Having fluid ram directly actuating load cable or sheave...
180140, B66C 502
Patent
active
051800705
ABSTRACT:
A directional control system for a gantry type cane operable in either a longitudinal direction or a transverse direction is disclosed. The gantry type crane has first and second, spaced front wheels and first and second, spaced rear wheels. The first front wheel and the first rear wheel are on one longitudinal side of the crane, and the second front wheel and the second rear wheel are on the other longitudinal side of the crane. The control system cooperatively rotates the first and second front wheels for controlling the direction of travel of the crane in the longitudinal direction, and cooperatively rotates the first front wheel and the first rear wheel for controlling the direction of travel of the crane in the transverse direction. Thus the wheels positioned perpendicular to the direction of travel provide the steering.
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patent: 3059782 (1962-10-01), Baudhuin
patent: 3161309 (1964-12-01), Baudhuin et al.
patent: 3314690 (1967-04-01), Bunchak
patent: 3972379 (1976-08-01), Norris
patent: 4378072 (1983-03-01), Appleman et al.
patent: 4457389 (1984-07-01), Voelz
patent: 4880124 (1989-11-01), Feider et al.
Avila Stephen P.
Shuttelift, Inc.
Sotelo Jesus D.
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