Ladder

Details Ladder Ladder

1975-02-06

1976-03-16

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

182206, 182228, 403376, E06C 708, E06C 902

Patent

active

039440249

ABSTRACT:
A ladder is made from extruded aluminum steps supported on a pair of vertical tubes fitted through large diameter holes drilled vertically through the steps. The steps are hollow except for a pair of vertical walls extending longitudinally thereof and lying on opposite sides of the vertical holes. Small horizontal holes are drilled through these walls from the rear of the steps to receive fastening pins which are driven through the tubes to locate and support the steps on the tubes.

REFERENCES:
patent: 3078955 (1963-02-01), Rich

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