Fire escape – ladder – or scaffold – Ladder with vertically moving platform or escape – Ladder supports platform
Patent
1996-09-17
1998-04-14
Chin-Shue, Alvin C.
Fire escape, ladder, or scaffold
Ladder with vertically moving platform or escape
Ladder supports platform
182118, 182129, E04G 108
Patent
active
057381852
ABSTRACT:
A lifting apparatus having a frame with a first bracing member and a second bracing member pivotally connected together with a ladder receptacle means affixed to an end of the second bracing member opposite the pivotal connection, and a pulley affixed to the frame so as to receive a cable therein such that a portion of the cable extends vertically downwardly between the first and second bracing member. At least one wheel is connected to an end of the first bracing member opposite the pivotal connection with the second bracing member so as to allow and end of the first bracing member to be moved toward and away from the second bracing member. A winch is attached to the first bracing member and a cable extends outwardly from the winch and over the pulley. A stop plate is connected to the frame at a location below the pivotal connection so as to limit an angle of pivotal movement of the first bracing member with respect to the second bracing member. The ladder sheath is pivotally connected to an end of the second bracing member.
REFERENCES:
patent: 231567 (1880-08-01), Harris
patent: 369148 (1887-08-01), Wright
patent: 3189123 (1965-06-01), Bond
patent: 4274508 (1981-06-01), Hughes et al.
patent: 4690248 (1987-09-01), Killeen
patent: 5139108 (1992-08-01), Pate
patent: 5242031 (1993-09-01), Ashley
Chin-Shue Alvin C.
Phan Long Dinh
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