Step ladder

Details Step ladder Step ladder

1986-11-17

1988-01-12

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Convertible

Ladder

182165, 182178, 182228, E06C 742, E06C 750

Patent

active

047185180

ABSTRACT:
A convertible step ladder having a back section (13) comprising a pair of rails (101, 102) cooperable with a detachable section (16) provides a step ladder that can be used on stairs as well as a flat surface. The detachable section has a horizontal cross member (168) spanning a pair of channels (162, 163) having orifices (162a, 163a) and bolts (166, 167). The rails (101, 102) seat in the channels on the cross member and have orifices (102b) registering with orifices (162a, 163a) whereby insertion of the rails (101, 102) onto the cross member (168) permits locking of the channels together by insertion of the bolts (166, 167) into the corresponding orifices.

REFERENCES:
patent: 375079 (1887-12-01), Luzmoor
patent: 1895213 (1933-01-01), Stindl
patent: 1942210 (1934-01-01), Harting
patent: 2396028 (1946-03-01), Spayd
patent: 2517991 (1950-08-01), Eddy
patent: 4086980 (1978-05-01), Shortes

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