Roof ladder

Details Roof ladder Roof ladder

1985-08-12

1986-12-30

Machado, Reinaldo P.

Fire escape, ladder, or scaffold

Pitched roof conforming scaffold

182107, 182206, 182228, E06C 536, E06C 136

Patent

active

046322191

ABSTRACT:
A ladder attachment is provided for holding a ladder on a sloping roof. Sharp, pointed members or claws are attached to the ladder which, in operation, protrude from the ladder in a direction facing the roof. The sharp, pointed members pierce into the roof a selected distance at a selected angle and hold the ladder on the roof without sliding. Multiple non-skid surfaces are also provided on the rungs of the ladder for supporting the user.

REFERENCES:
patent: 341178 (1886-05-01), Specht
patent: 524661 (1894-08-01), Austin
patent: 599963 (1898-03-01), Hatch
patent: 1028362 (1912-06-01), King
patent: 1143555 (1915-06-01), Schimmelpfennig
patent: 1248228 (1917-11-01), West
patent: 1379808 (1921-05-01), Fies
patent: 1684269 (1928-09-01), Hebner
patent: 1743371 (1930-01-01), Montag
patent: 2476401 (1949-07-01), Campion
patent: 4184569 (1980-01-01), Grenier
patent: 4311207 (1982-01-01), Lurry

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