Stepladders

Details Stepladders Stepladders

1977-03-09

1978-03-21

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder with pivoted prop

Pivoted to top-step cleat

182124, 182217, E06C 116

Patent

active

040798143

ABSTRACT:
Stepladders are made of extruded aluminum metal parts including special bracket members for the rear prop section and the bucket rack that mitigate torsional twist. Cross bracings for the rear prop section and bracings of the front section are structured to prevent pantographing or rotation and reduce to a minimum the number of rivets required for ladder assembly thereby providing strong, safe ladders of light weight and low cost.

REFERENCES:
patent: 1592109 (1926-07-01), Jacobs
patent: 1866974 (1932-07-01), Hohing
patent: 3083786 (1963-04-01), Arnold

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