Safety device for lifter-equipped extensible ladder vehicle

Details Safety device for lifter-equipped extensible ladder vehicle Safety device for lifter-equipped extensible ladder vehicle

1974-11-08

1976-04-13

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Automatic control

182103, E06C 712

Patent

active

039498336

ABSTRACT:
A device for use with a high-altitude working vehicle provided with a vertically and horizontally revolvable and extensible ladder and an operator-carrying lifter movable up and down along the ladder, the device being characterized in that it allows the exension and contraction of the ladder only when the lifter is at a predetermined position, thereby securing safety of the operator riding in the lifter. Other advantages and details of the construction will be made clear.

REFERENCES:
patent: 2894605 (1959-07-01), Leavitt
patent: 3693755 (1972-09-01), Terayama

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