Magnetorheological fluid devices
June 18, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3174587 Flexible column viscous spring damper Viscous spring damper Elastically damping device for suspension of engine Electro-magnetic vibration-damping mount Vibration damping system for power unit Vibration-preventing rubber device Electronic motor mount with magnetic decoupler Two chamber engine mount Two-chamber engine bearing which has hydraulic damping InventorsAssigneeApplicationNo. 900567 filed on 06/18/1992US Classes:267/140.14, With electronic or magnetic control188/267.2, Magnetic fluid or material (e.g., powder)267/141.2Confined between coaxial, vibrating annular membersExaminersPrimary: Oberleitner, Robert J.Assistant: Schwartz, Christopher P. Attorney, Agent or FirmForeign Patent References
International ClassF16F 006/00AbstractThis invention relates to sealless designs of magnetorheological fluid dampers. With these sealless designs a piston rod extends above and below a piston head within a cylindrical housing and has frustoconical elastomer elements attached to and between the rod and housing to allow translation of the piston head and rod. The piston head has a coil contained radially therein that produces magnetic flux in and around the piston. The advantages of utilizing an MR fluid according to the invention include magnetic fields which are easily produced by low voltage electromagnetic coils, damping effects which are velocity independent, and higher yield strength obtained by the MR fluid capable of generating greater damping forces. | |
