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US Patent 6481546 - Magneto-rheological damping valve using laminated construction
US Patent Issued on November 19, 2002
Estimated Patent Expiration Date:
January 4, 2021Estimated 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.
Estimated Patent Expiration Date:
January 4, 2021Estimated 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.AbstractA 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. | 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 structureField of Search188/267, Using magnetic flux188/267.1, Electroviscous or electrorheological fluid188/267.2, Magnetic fluid or material (e.g., powder)188/266.2, Condition actuates valve or regulator188/266.7, Piezoelectric188/269, 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)188/322.17, Between piston rod and cylinder188/322.18, Between piston and cylinder188/322.22, Thrust member or piston structure188/322.5, Using viscosity of fluid medium267/140.14, With electronic or magnetic control267/140.15, With electronic or magnetic control29/597, Commutator or slip ring assembly174/126.2CompositeExaminersPrimary: Schwartz, Christopher P.Assistant: Torres, Melanie Attorney, Agent or FirmUS Patent References3882427, 5018606, Electrophoretic fluid damperIssued on: 05/28/1991 Inventor: Carlson5277281, Magnetorheological fluid dampers Issued on: 01/11/1994 Inventor: Carlson, et al.5284330, Magnetorheological fluid devices Issued on: 02/08/1994 Inventor: Carlson, et al.5398917, Magnetorheological fluid devices Issued on: 03/21/1995 Inventor: Carlson, et al.5472069, Vibration damping device Issued on: 12/05/1995 Inventor: Austin5867892, Method and apparatus for rotationally orienting an armature shaft Issued on: 02/09/1999 Inventor: Beakes, et al.5878851, Controllable vibration apparatus Issued on: 03/09/1999 Inventor: Carlson, et al.5956951, Adjustable magneto-rheological fluid device Issued on: 09/28/1999 Inventor: O'Callaghan6019201, Magneto-rheological fluid damper Issued on: 02/01/2000 Inventor: Gordaninejad, et al.6095486, Two-way magnetorheological fluid valve assembly and devices utilizing same Issued on: 08/01/2000 Inventor: Ivers, et al.6279700Magnetorheological fluid damper Issued on: 08/28/2001 Inventor: Lisenker, et al. International ClassF16F 009/53 |
