Fire escape – ladder – or scaffold – Safety device for ground-supported ladder
Patent
1987-02-13
1988-02-09
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Safety device for ground-supported ladder
182172, E06C 536, E06C 746
Patent
active
047236299
ABSTRACT:
An extension ladder includes outwardly facing auxiliary rail channels at the lower end on each of the side rails which nestingly engage inwardly facing channels on auxiliary legs extending at an angle to the plane of the ladder for supporting the ladder on irregular terrain in a stable manner. The leg assemblies are selectively positioned independently of each other and locked in a desired position by spring-loaded fingers carried on the leg assembly channels which engage teeth on the ladder rail channels. An extension leg for either of the ladder rails is provided which nestingly engages the ladder rail channel and is locked in place by a spring-loaded finger engaging the teeth on the rail channel.
REFERENCES:
patent: 766385 (1904-08-01), Richardson
patent: 840365 (1907-01-01), Pease
patent: 1083744 (1914-01-01), Jones
patent: 1251761 (1918-01-01), Enke
patent: 1710026 (1929-04-01), McCormick
patent: 1910551 (1933-05-01), Kruse
patent: 2113282 (1938-04-01), Quinn
patent: 2139479 (1938-12-01), Wertz
patent: 3043397 (1962-07-01), Tillotson
patent: 4565262 (1986-01-01), Hawkins
patent: 4632220 (1986-12-01), Murrell
Maasdam Leonard J.
Vanden Hoek Vernon M.
Machado Reinaldo P.
Vanden Hoek Vernon M.
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