Tunable electrorheological fluid mount

Brakes – Internal-resistance motion retarder – Magnetic fluid or material

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Details

188269, 188320, 1883225, 248562, 2671401, B60G 1710, F16F 1503, F16M 500

Patent

active

047337583

ABSTRACT:
The mount has variable volume fluid chambers interconnected by fluid passageways and containing electrorheological fluid. Valves are arranged in series with a plurality of the passageways. Each valve has a flow area greater than that of the passageway in series therewith. Energization of a valve generates an electrical field effective to so increase the apparent viscosity of the fluid within the valve as to prevent fluid flow through the passageway in series with it. Selective energization of the valves, by suitable controls associated therewith, varies the frequencies at which fluid inertia forces cause the mount to undergo abrupt changes in dynamic stiffness. The valves may be located upon opposite sides of a central mount section through which the chamber connecting passages extend. Electrode elements of the valves are preferably so shaped as to minimize fluid drag and electrical concentration. In one embodiment the passageways all communicate at one end with a common variable volume chamber, while communicating at their opposite ends with respective ones of a plurality of different chambers.

REFERENCES:
patent: 2661596 (1953-12-01), Winslow
patent: 3207269 (1965-12-01), Klass
patent: 4262886 (1981-04-01), Salver et al.
patent: 4458888 (1984-07-01), Wolf et al.

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