Combination stepladder and load lifting apparatus

Details Combination stepladder and load lifting apparatus Combination stepladder and load lifting apparatus

1979-03-28

1981-03-31

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Convertible

182103, 187 10, 280 30, 280 4728, B62B 120, E06C 1397, E06C 716

Patent

active

042588260

ABSTRACT:
Two frame sections are hingedly attached at their top and each frame section contains a pair of wheels at the bottom. One of the frame sections consists of a pair of laterally spaced parallel side rails having horizontal steps disposed therebetween. The other frame section contains a pair of parallel spaced channel bars on which ride a vertically movable platform. The platform can be hoisted along the channel bars by use of a hand crank and winch assembly. The two frame sections can be folded together for use as a conventional hand truck or the frame sections can be folded apart and the wheels locked for use as a stepladder.

REFERENCES:
patent: 107225 (1870-09-01), Claflin
patent: 312016 (1885-02-01), Price et al.
patent: 867754 (1907-10-01), Randall
patent: 1992108 (1935-02-01), White
patent: 2514825 (1950-07-01), Zenko
patent: 2588959 (1952-03-01), Campbell
patent: 2680027 (1954-06-01), Puydt
patent: 2881865 (1959-04-01), Lewis
patent: 2981374 (1961-04-01), Holsclaw
patent: 3476212 (1969-11-01), Eakins
patent: 3490558 (1970-01-01), Foley
patent: 3578353 (1971-05-01), Lockhart

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