Tongs-like cargo hook device with automatic loading and unloadin

Details Tongs-like cargo hook device with automatic loading and unloadin Tongs-like cargo hook device with automatic loading and unloadin

1988-10-24

1990-07-24

Focarino, Margaret A.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Load releasing means

294 88, 2941101, 294118, B66C 138

Patent

active

049430998

ABSTRACT:
This is a cable-scooping cargo hook device, pivoted near its center and weighted on top to help force its lower portions to automatically separate upon touchdown on a platform to discharge its load cable. By having the device sit on one of its jaws, the device can be made to avoid rescooping a discharged cable, in its simplest version. Also to assist in discharging its load cable are two inwardly protruding extensions with hammerheads, located above the pivot pin. These hammerheads have magnets of like polarity facing each other to produce a repulsive force and cause the device's jaws to open immediately when the hoist cables slacken, a feature to assist in the jaws straddling and scooping up a load cable. Also an electromagnet to perform the same function as the permanent magnets is described. Then a technique involving additional electromagnets enables the device not only to discharge a loaded cable while suspended, but also to improve its automatic loading ability. In addition to the use of one or more electromagnets for achieving positive load retention, positive load retention techniques are shown which are completely mechanical, requiring no electrical energy source.

REFERENCES:
patent: 1507706 (1924-09-01), Miller et al.
patent: 4452481 (1984-06-01), Williams
patent: 4542929 (1985-09-01), Possinger
patent: 4717189 (1988-01-01), Gabriel

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