Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1981-02-09
1983-12-20
Rolla, Joseph J.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
414631, B66B 920
Patent
active
044212089
ABSTRACT:
A triple-stage upright having a fixed upright section, two telescopic upright sections, and a load carrier mounted on the inner telescopic section. A first asymmetric lift cylinder assembly is located in the upright off-center and adjacent to one side of the upright and a second asymmetric lift cylinder assembly is mounted in the upright off-center and adjacent to the opposite side of the upright. Both cylinder assemblies are supported from a common base, one of the cylinders being operatively connected to the load carrier, and the other lift cylinder being operatively connected to both telescopic upright sections. The lift cylinder which is connected to the load carrier is, when collapsed, approximately one-half the height of the collapsed upright, and the other lift cylinder assembly is, when collapsed, approximately equal to the height of the collapsed upright. A unique balancing system is implemented in the combination of cylinder locations and respective reeving of lifting chains which maintains a substantial balance of force-moments in the transverse plane of the upright.
REFERENCES:
patent: 2618360 (1952-11-01), MacDonald
patent: 2788863 (1957-04-01), Ulinski
patent: 2883003 (1959-04-01), Arnot
patent: 3360078 (1967-12-01), Hopfeld
patent: 3394778 (1968-07-01), Brinton
patent: 3830342 (1974-08-01), Allen
patent: 4030568 (1977-06-01), Heinold
Bartow-Patent applications (Ser. No. 202099) (Ser. No. 176342), filed Oct. 30, 1980 and Aug. 11, 1980, respectively.
Clark Equipment Company
Noland Kenneth
Rolla Joseph J.
Wiessler John C.
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