Drive control apparatus

Details Drive control apparatus Drive control apparatus

1989-10-27

1991-08-13

Olszewski, Robert P.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187100, 335 51, B66B 1104

Patent

active

050388940

ABSTRACT:
A drive control apparatus includes a magnetic field in which a magnetic field gradient is provided by applying a magnetic field to the magnetic fluid to produce an apparent specific gravity gradient in accordance with the magnetic field gradient. A control member immersed in the magnetic fluid moves under the influence of buoyant force from a gradient of the apparent specific gravity produced in accordance with the magnetic field gradient, so that a driven body interlocking with the control member is driven at a low noise level.

REFERENCES:
patent: 2570095 (1951-10-01), Buckler et al.
patent: 2870285 (1959-01-01), Rufle
patent: 3274522 (1966-09-01), Heller
patent: 3308405 (1967-03-01), Hurvitz
patent: 4292615 (1981-09-01), Ohashi

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