Fire escape – ladder – or scaffold – Ladder – Supporting surface compensating means
Patent
1995-12-29
1998-02-17
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Ladder
Supporting surface compensating means
182111, E06C 700
Patent
active
057183066
ABSTRACT:
A ladder leveling device is provided with an integrally formed tubular guide, a locking mechanism, a support shaft and a pivot foot. The tubular guide is attached to a ladder through its base portion. A guide bore is provided in the tubular guide for receiving the support shaft which may slide within the guide bore. A locking mechanism is housed in a lock portion of the tubular guide. The locking mechanism locks the support shaft in a fixed position relative to the tubular guide. The lock portion of the tubular guide protects the locking mechanism from foreign objects and reduces the risk of accidental release. A hole is provided on the side and rear surfaces of the lock portion for operating the locking mechanism and further increasing the safety and ease of use of the invention.
REFERENCES:
patent: 979821 (1910-12-01), Brasington
patent: 987960 (1911-03-01), Connors
patent: 1229218 (1917-06-01), Bryant
patent: 1442694 (1923-01-01), Martin
patent: 2177677 (1939-10-01), Staben
patent: 2205869 (1940-06-01), Wakeman
patent: 2371460 (1945-03-01), Needham
patent: 2620115 (1952-12-01), Guldjerd
patent: 3406785 (1968-10-01), Pilcher
patent: 3948352 (1976-04-01), Larson et al.
patent: 4669576 (1987-06-01), Jones et al.
patent: 4766976 (1988-08-01), Wallick, Jr.
patent: 5107958 (1992-04-01), Johnson
Burns Ian F.
Chin-Shue Alvin C.
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