Extension ladders

Details Extension ladders Extension ladders

1979-05-14

1980-09-16

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Extension

E06C 706, E06C 112

Patent

active

042224608

ABSTRACT:
The fly sections of extension ladders are provided at the bottom end with opposed housing bars upon which a rung is mounted thereby avoiding the usual hazard of a skipped rung. The housing bars are constructed and mounted on the fly section to provide multi-directional strength while permitting full movement, in the space between the mounting bar and the ladder side rail, of automatic hook locks equipped with conventional toggles. The improved constructions are especially suited to the manufacture of all-metal ladders.

REFERENCES:
patent: 864194 (1907-08-01), Reimann
patent: 1457100 (1923-05-01), Bolger
patent: 1950574 (1934-03-01), Smith

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