Magnetorheological fluid damper
Patent 6279700 Issued on August 28, 2001. Estimated Expiration Date: 
September 13, 2019. 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.
September 13, 2019. 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 2661596 3207269 Magnetorheological fluid dampers Vibration damper, in particular for motor vehicles Controllable vibration apparatus Magneto-rheological fluid damper Patent #: 6019201 InventorsAssigneeApplicationNo. 395070 filed on 09/13/1999US Classes:188/267.1, Electroviscous or electrorheological fluid188/322.15Piston valve detail (e.g., seat design, structural arrangement, metering element)ExaminersPrimary: Graham, Matthew C.Attorney, Agent or FirmForeign Patent References
International ClassF16F 009/06AbstractA magnetorheological fluid damper is provided which permits effective control of damping while minimizing assembly size and costs by including a thin-walled insert in a flow gap formed between a flux ring and a piston body. The insert may include a thin-walled tubular insert having a generally smooth cylindrical shape for increasing the shear surface area. Alternatively, a corrugated insert may be provided having corrugations formed by edges extending axially along the insert. The corrugations may be formed in a variety of locations, sizes, shapes and spacings along the axial extent of the insert and the circumference of the insert. The corrugations advantageously effectively align the insert within the flow gap and also function to securely connect the flux ring to the piston body without the use of other devices such as plates thereby reducing the size and cost of the assembly. | |
