Material or article handling – Self-loading or unloading vehicles – Loading or unloading by other carrier or mover means – and...
Patent
1978-03-01
1979-09-18
Sheridan, Robert G.
Material or article handling
Self-loading or unloading vehicles
Loading or unloading by other carrier or mover means, and...
105445, 105447, 280166, 414921, B60P 146
Patent
active
041681347
ABSTRACT:
A lift assembly is provided which can be mechanically converted from a stationary step-like configuration to a movable platform configuration, thus allowing both handicapped and non-handicapped passengers to use a single vehicle entrance having the lift assembly operative within it.
A pair of lifting columns are provided which are movable along guide members mounted at the entrance of the vehicle. A platform is hingably connected at its inner edge to the bases of the lifting columns and comprises a linear assembly of hinged plates. Radius arms, pivotally connected with the outer edge portion of the platform and with the lifting columns, suspend the outer end of the platform. Means, such as hydraulic cylinders, pivotally connected with the outer edge portion of the platform and with the lifting columns, are controlled to extend or contract the assembly of hinged plates between a flat, horizontal configuration level with the floor surface of the vehicle and a step-like configuration within the opening and also act to securely maintain the plates in the desired configuration. Means are provided to raise or lower the lifting columns while the platform is in the flat, horizontal configuration. In this manner the platform may be lowered to the grade to receive a passenger and raised to the level of the vehicle floor.
REFERENCES:
patent: 3651965 (1972-03-01), Simonelli et al.
patent: 4027807 (1977-06-01), Thorley
Johnson Ernest Peter
Sheridan Robert G.
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