Lifting apparatus

Details Lifting apparatus Lifting apparatus

1994-03-31

1995-07-11

Chin-Shue, Alvin C.

Fire escape, ladder, or scaffold

Having transpositioning base and erecting means

182141, B66F 1104

Patent

active

054312477

ABSTRACT:
A lifting apparatus capable of lifting operators or materials upward and capable of lifting a platform on which heavy materials are placed to an elevated spot. The lifting apparatus comprises a pair of middle booms which are rotatably coupled to each other at the center thereof in an X-shape, a lower boom which is extended from or contracted in the middle boom and is connected to a chassis, an upper boom which is extended from and contracted in the middle boom and is connected to the platform, and an operating mechanism which is disposed between the chassis and the middle booms and is movable from a folded position into a vertically straight position for lifting the middle booms.

REFERENCES:
patent: 3619007 (1971-11-01), Phillips
patent: 3664459 (1972-05-01), Stephens
patent: 3820631 (1974-06-01), King et al.
patent: 4466509 (1984-08-01), Kishi
patent: 4518061 (1985-05-01), Wehmeyer et al.
patent: 4890692 (1990-01-01), Oakman
patent: 5099950 (1992-03-01), Kishi

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