Hoisting devices

Details Hoisting devices Hoisting devices

1990-10-30

1992-05-19

Basinger, Sherman

Traversing hoists

Having counterweight or counterbalancing means

Counterweight movable relative to load support

254285, 254900, 4141396, B66C 2353

Patent

active

051140268

ABSTRACT:
A hoisting device comprises a cable controlled at one end by a conventional crane winch assembly and at the other end by a traction winch assembly comprising traction device and storage winch. The hook is raised and lowered using the crane winch assembly and/or traction winch assembly depending upon whether the operation requires critical control or long haul travel.

REFERENCES:
patent: 2045533 (1936-06-01), Smaltz
patent: 3467360 (1969-09-01), Mizell
patent: 3918653 (1975-11-01), Harms et al.
patent: 4147330 (1979-04-01), Eik
patent: 4157812 (1979-06-01), Bennett
patent: 4223871 (1980-09-01), Braithwaite
patent: 4324385 (1982-04-01), Cojean et al.

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