| 摘要 |
A piston plate for use with a magneto-rheological ("MR") fluid damper. The piston plate comprises an inner hub and outer rim. The hub has simple geometry and is made from easily machineable material, permitting it to be fabricated using low-cost processes. The rim, which is secured over the hub, is made from a high strength, ferrous metal. The rim may be heat treated for greater strength and reduced magnetic permeability. In one embodiment of the present invention, the rim may be made from powdered metal. A magnetic insulator may be included on an interior face of the piston plate to reduce magnetic coupling between the rim and a piston core in a piston assembly. In another embodiment of the present invention, the piston plate may be made as a single piece from compressed powdered metal.
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