Brakes – Internal-resistance motion retarder – Magnetic fluid or material
Patent
1986-08-18
1988-03-29
Dorner, Kenneth J.
Brakes
Internal-resistance motion retarder
Magnetic fluid or material
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.
Carlson J. David
Duclos Theodore G.
Hodgson Douglas A.
Brown Peter R.
Dorner Kenneth J.
Lord Corporation
McCann Philip P.
McCombs David L.
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