Programmable variable spring member

Details Programmable variable spring member Programmable variable spring member

2005-08-02

2005-08-02

Graham, Matthew C. (Department: 3683)

Brakes

Internal-resistance motion retarder

Electroviscous or electrorheological fluid

C188S267000, C188S267200, C267S136000

Reexamination Certificate

active

06923299

ABSTRACT:
A variable spring member includes a containment housing defining an inner chamber with alternating layers of compressible medium and electro-reactive medium. Adjacent each layer of electro-reactive medium is a coil assembly controlled by a controller. A sealed plate disposed between alternating layers of compressible medium and electro-reactive medium disperses a load exerted on the variable spring member assembly and prevents intermixing of compressible medium with the electro-reactive medium. Actuation of the coil assembly changes physical characteristics and compressibility of the layer of electro-reactive medium to vary spring rate and stiffness.

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