Ladder and method of construction therefor

Details Ladder and method of construction therefor Ladder and method of construction therefor

1977-07-25

1979-12-11

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Independent support for rung

182228, 182 46, E06C 708, E06C 750

Patent

active

041778790

ABSTRACT:
A ladder with elongated side rails each with a web with two broad surfaces, and rungs supported by and extending between the webs of the side rails at spaced locations, has rung brackets molded into and embracing the webs, each of the rung brackets having a rung receiving boss and a base part on one broad surface of the web and a pad part on the other broad surface, and tying members, integral with the base and pad parts, connecting the parts and extending into the web. In making the ladder, holes are formed in the webs at the rung locations and the rung brackets are molded in place in and through those holes.

REFERENCES:
patent: 817174 (1906-04-01), Jones
patent: 2821764 (1958-02-01), Leahy
patent: 3225862 (1965-12-01), Fink
patent: 3354987 (1967-11-01), Werner
patent: 3481428 (1969-12-01), Merritt
patent: 3502173 (1970-03-01), Arnold

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