Fluid-operated, load-handling apparatus

Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum

Patent

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Details

254360, B66D 108, B66D 148

Patent

active

044625715

ABSTRACT:
A fluid-operated, load-handling apparatus is provided for handling loads of various weights. The apparatus includes a fluid-operated hoist with an elongate member extending downwardly to a load-carrying unit. A pilot fluid-controlled regulator supplies fluid to the hoist and a load-responsive, pilot fluid regulator is carried by the load-carrying unit and supplies pilot fluid to the pilot fluid-controlled regulator. The pilot fluid is varied according to the weight of a load, being higher for heavier loads and lower for lighter loads so that the pressure of the fluid supplied to the hoist is accordingly varied by the pilot fluid-controlled regulator to automatically balance the load carried by the load-carrying unit. The apparatus also can include a brake for preventing the elongate member from moving up or down while loads are being changed or are at rest.

REFERENCES:
patent: 2831554 (1958-04-01), Reynolds
patent: 3260508 (1966-07-01), Powell
patent: 3384350 (1968-05-01), Powell
patent: 3457837 (1969-07-01), Powell
patent: 3901478 (1975-08-01), Peterson
patent: 3933388 (1976-01-01), Conboy

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