Ladder means and method of production

Details Ladder means and method of production Ladder means and method of production

1985-12-10

1987-04-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

182228, 182173, E06C 708, E06C 750

Patent

active

046553207

ABSTRACT:
A ladder comprises a pair of spaced stiles, each having a channel shaped cross-section with the flanges of each stile directed towards those of the other, and a plurality of rungs interconnecting the stiles, each rung also being of general channel section, the tread portion of the rung defining an acute angle with one flange and an obtuse angle with the other flange, and weld beads joining the outer surface of the acute angled rung with one flange of each stile and the inner surface of the obtuse angle rung with the web of each stile.

REFERENCES:
patent: 3005513 (1961-10-01), Larson
patent: 3638759 (1972-02-01), Engelhardt
patent: 4161997 (1979-07-01), Norman
patent: 4187928 (1980-02-01), Larson

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