Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1986-12-29
1988-05-03
Bartuska, F. J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
187 9R, 182141, 91520, 74521, 52109, 254 9C, 414589, B60S 1300, E04G 118
Patent
active
047414138
ABSTRACT:
An elevating apparatus including a base, a platform, at least a pair of pivotally interconnected boom assemblies connecting the base and the platform together, the pair of boom assemblies including a pair of hollow middle booms pivotally interconnected substantially centrally thereof by a shaft, and upper and lower booms telescopically disposed in each of the middle booms and movable out of upper and lower ends of the middle booms, the lower booms having ends pivotally mounted on the base in spaced relation and the upper booms having ends pivotally mounted on the platform in spaced relation, each of the boom assemblies including a synchronizer for synchronizing intervals of extension of the upper and lower booms from the middle boom, a pair of hydraulic mechanisms operatively coupled between the shaft and the base at spaced locations thereon for moving the middle booms to displace the upper and lower booms into and out of the middle booms to lift and lower the platform, and a controller for selectively controlling the hydraulic mechanisms to move the platform substantially vertically and horizontally.
REFERENCES:
patent: 3476016 (1969-11-01), Dixon
patent: 3820631 (1974-06-01), King et al.
patent: 4130178 (1978-12-01), Smith, Jr.
patent: 4343379 (1982-08-01), Haulotte
patent: 4455921 (1984-06-01), Griesbach
patent: 4466509 (1984-08-01), Kishi
patent: 4484663 (1984-11-01), Wyse
patent: 4518061 (1985-05-01), Wehmeyer et al.
Bartuska F. J.
Huson Gregory L.
Kabushiki Kaisha Hikoma Seisakusho
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