Sectional ladder lock

Details Sectional ladder lock Sectional ladder lock

1978-11-30

1980-10-07

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Stackable

Male and female connecting means

E06C 110

Patent

active

042263026

ABSTRACT:
There is disclosed herein a sectional ladder having at least a pair of ladder sections adapted to be slideably moved relative to the other for extension or retraction, one section carrying means adapted to engage a latch mounted on the other section for automatically locking the separate sections together in a selected locked position.

REFERENCES:
patent: 301980 (1884-07-01), Gates
patent: 303721 (1884-08-01), Gates
patent: 337640 (1886-03-01), Warner
patent: 550175 (1895-11-01), Holden
patent: 1263358 (1918-04-01), Anderson
patent: 2610875 (1952-09-01), Wheelden
patent: 2900041 (1959-08-01), Leavitt
patent: 3347584 (1967-10-01), Johnstone

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