Magneto-rheological damping valve using laminated construction
January 4, 2021. 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 3882427 Electrophoretic fluid damper Magnetorheological fluid dampers Magnetorheological fluid devices Magnetorheological fluid devices Vibration damping device Method and apparatus for rotationally orienting an armature shaft Controllable vibration apparatus Adjustable magneto-rheological fluid device Magneto-rheological fluid damper InventorsAssigneeApplicationNo. 754745 filed on 01/04/2001US Classes:188/267.1, Electroviscous or electrorheological fluid188/269, Using diverse fluids188/283, Piston having a restrictable opening (e.g., apertured plate) in a fixed volume chamber188/286, Having aperture in chamber wall188/322.15, Piston valve detail (e.g., seat design, structural arrangement, metering element)188/322.22Thrust member or piston structureExaminersPrimary: Schwartz, Christopher P.Assistant: Torres, Melanie Attorney, Agent or FirmInternational ClassF16F 009/53AbstractA magneto-rheological damping device comprises a core element capable of acting as a magnetic circuit which carries a magnetic flux, and a case element surrounding a portion of the core element. A passage exists between the case element and core element, and an amount of magneto-rheological fluid is positioned between the core element and case element to flow within the passage.A magnetic flux generator is positioned adjacent a portion of the core element and is operable to generate a magnetic flux which acts upon the magneto-rheological fluid in the passage to affect the flow of fluid in the passage.The core element comprises a plurality of stacked laminations, which form a series of individual magnetic poles with gaps therebetween. The magnetic flux generator is operable to generate a magnetic flux in the poles and case element and across the gaps to affect the fluid flow in the passage.Field of SearchUsing magnetic fluxElectroviscous or electrorheological fluid Magnetic fluid or material (e.g., powder) Condition actuates valve or regulator Piezoelectric Using diverse fluids Piston having a restrictable opening (e.g., apertured plate) in a fixed volume chamber Having aperture in chamber wall Piston valve detail (e.g., seat design, structural arrangement, metering element) Between piston rod and cylinder Between piston and cylinder Thrust member or piston structure Using viscosity of fluid medium With electronic or magnetic control With electronic or magnetic control Commutator or slip ring assembly Composite | |
