Vertical conveyor

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

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187 17, 187 20, 182141, B66B 1104

Patent

active

052053792

ABSTRACT:
A vertical conveyor for lifting materials between different vertical levels. The conveyor comprises a pair of spaced upright supports or beams and a carriage to support a load or cargo is guided for vertical movement on the beams. A hydraulic cylinder unit is associated with each beam and the ram or piston rod of each cylinder unit carries a first sheave, while a second sheave is located at the upper end of each beam. A link chain formed of a plurality of interconnected loops is trained over each first and second sheave, and one end of each chain is dead-ended on the respective beam, while the opposite end of the chain is connected to the carriage. Retraction of the piston rod will move the carriage upwardly to a second vertical level. The axes of the first sheaves are located at 90.degree. with respect to the axes of the second sheaves, so that the cylinder can be mounted tight against the beams to minimize the bending moment. A horizontal shaft connects the second sheaves and synchronizes movement of the two chains.

REFERENCES:
patent: 3757899 (1973-09-01), Smith, Jr.
patent: 4222461 (1980-09-01), Gunti
patent: 4252217 (1981-02-01), Benjamin
patent: 4830146 (1989-05-01), Nakamura et al.
patent: 5056627 (1991-10-01), Pelto-Huikko
"Vertical Material Handling", Pflow Industries, Inc., Milwaukee, Wis.
"Nothing Lifts Like A Langley", Mfg. Div. of M. D. Knowlton Co. Victor NY.

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