Pole ladder

Details Pole ladder Pole ladder

1975-12-03

1977-03-01

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Scaffold external of shaft

A47C 910

Patent

active

040097633

ABSTRACT:
A collapsible ladder for suspension on a pole, securely in place, by the mere stepping on the platform or treads which effects insertion of cleats into the pole. A chain, which surrounds the pole for supporting the ladder, is tightly gripped around the pole by turning a swivelly mounted tightening screw.

REFERENCES:
patent: 505343 (1893-09-01), Austin
patent: 1955127 (1934-04-01), Heintz
patent: 2060953 (1936-11-01), Strom
patent: 2855980 (1958-10-01), Konieczka
patent: 2982337 (1961-05-01), Arena
patent: 3817350 (1974-06-01), Gray

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