Tong-like, cable-scooping, hoist-cable coupling device for suspe

Details Tong-like, cable-scooping, hoist-cable coupling device for suspe Tong-like, cable-scooping, hoist-cable coupling device for suspe

1986-03-31

1988-01-05

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Load releasing means

294 823, B66C 138

Patent

active

047171898

ABSTRACT:
The hoist-cable coupling device is tong-like in appearance, pivoted near its center and weighted on top to force its lower portions to automatically separate when lowered onto a platform to discharge its load cable. When lifted, its lower ends are designed to scoop up the load cable. Its lower mating ends are protected from high compressive stresses caused by heavy loads by inwardly protruding extensions with hammerheads, located either above or below the pivoted point. In one version a solenoid with shaft extension and hook to engage an opposing hook is included, for positive load retention. In another version an electromagnet is incorporated into the above hammerheads for accomplishing the positive load retention. Unless voltage is applied to either the solenoid or the electromagnet, its lower mating portions will under no circumstances separate and discharge the load cable suspending a load.

REFERENCES:
patent: 67989 (1867-08-01), Kempton
patent: 373325 (1887-11-01), Willing
patent: 1346160 (1920-07-01), Barlow
patent: 1507706 (1924-09-01), Miller et al.
patent: 1808689 (1931-06-01), Stenhouse et al.
patent: 2213014 (1940-08-01), Owen
patent: 3164406 (1965-01-01), Barry
patent: 3655233 (1972-04-01), Twist
patent: 4452481 (1984-06-01), Williams

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