Fire escape – ladder – or scaffold – Means maintaining platform level on angularly movable support – Swingable support
Patent
1997-10-24
2000-01-11
Chin-Shue, Alvin
Fire escape, ladder, or scaffold
Means maintaining platform level on angularly movable support
Swingable support
182 21, B66F 1104
Patent
active
060125446
ABSTRACT:
The aerial work platform includes a support frame, wheels rotatably attached to the support frame, and an electric motor rotatably driving at least one of the wheels. A boom having a first end is pivotably mounted to the support frame, and a fluid motor raises and lowers the boom with respect to the support frame. A work platform is supported by a second end of the boom. A battery pack supplies power to the electric motor. A first support structure, for supporting an auxiliary power plant that supplements power supplied by said battery pack, removably attaches to the support frame.
REFERENCES:
patent: 1734645 (1929-11-01), Polland
patent: 3667563 (1972-06-01), Korb
patent: 3719881 (1973-03-01), Shibata et al.
patent: 4019604 (1977-04-01), Benson
patent: 4058182 (1977-11-01), Huber
patent: 5251721 (1993-10-01), Ortenheim
patent: 5584356 (1996-12-01), Goodrich
Backer Robert D.
Hess Brian S.
Skidmore Danny J.
Wagner Gregg A.
Chin-Shue Alvin
Grove U.S. L.L.C.
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