Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Patent
1993-07-30
1994-05-03
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
182111, E06C 744
Patent
active
053079000
ABSTRACT:
A ladder extension leg apparatus is provided, wherein at least one of the first and second ladder legs includes a leg sleeve receiving the ladder leg to permit telescoping reception of the ladder leg to impart unequal effective length to the first and second legs to accommodate various uneven support heights to the ladder structure.
REFERENCES:
patent: 294199 (1884-02-01), Cloyes
patent: 970425 (1910-09-01), Curran
patent: 1672596 (1928-06-01), Zerk
patent: 3165170 (1965-01-01), Blaney
patent: 4671383 (1987-06-01), Huang
patent: 5012895 (1991-05-01), Santos
Chin-Shue Alvin C.
Gilden Leon
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