Automatic anti-fall device for power-driven lifting machinery

Details Automatic anti-fall device for power-driven lifting machinery Automatic anti-fall device for power-driven lifting machinery

1976-07-26

1978-08-15

Hoffman, Drayton E.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

182112, 188 651, 188188, 254156, B66D 504

Patent

active

041067533

ABSTRACT:
The device, adapted to be associated with a motorized hauling installation, comprises a self-clamping jaws block with a safety cable passing through it onto which the load can be transferred by clamping the jaws. The jaws block is connected by means of control rods to a mobile chassis of which one end is adapted to pivot, in case of a fall, about a fixed point of the casing, this pivoting action activating an electric detector which stops the machine motor. (FIG. 1).

REFERENCES:
patent: 853733 (1907-05-01), Pratt
patent: 1165583 (1915-12-01), Farmer
patent: 3273671 (1966-09-01), Vrana
patent: 3669223 (1972-06-01), Arnold
patent: 3936622 (1976-02-01), McElroy
patent: 3968865 (1976-07-01), McElroy

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