Collapsible ladder

Details Collapsible ladder Collapsible ladder

1977-11-10

1978-10-10

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Ladder

Slidable nested single rung units

182228, E06C 112, E06C 138

Patent

active

041191773

ABSTRACT:
A collapsible ladder consisting of a plurality of telescoping upright sections in which the uppermost rung of each section is fixedly mounted in the uprights, and in which the uprights of one or more upper sections are provided with longitudinal guideways in which end portions of at least the lowermost one of the rungs of the section are displaceable.

REFERENCES:
patent: 1029768 (1912-06-01), Schneider
patent: 1495197 (1924-05-01), Oakley
patent: 1567447 (1925-12-01), McCracken
patent: 2857087 (1958-10-01), Pratt
patent: 3653463 (1972-04-01), Neal
patent: 3997026 (1976-12-01), Riehlmann

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