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Magneto-Rheological (MR) Fluid * MR Library * Patents
 

Patents

LORD, an innovator in motion control for more than 80 years, is the world leader in the development of MR fluids and devices. LORD has broad patent coverage in MR technology, owning approximately one-half of all U.S. MR fluid patents and one-third of all U.S. MR device patents.

U.S. PATENT
ISSUE DATE
DESCRIPTION
4491207 1/1/1985 Fluid Control Means for Vehicle Suspension System
4733758 3/29/1988 Tunable Electrorheological Fluid Mount
4772407 9/20/1988 Electrorheological Fluids
4836342 6/6/1989 Controllable Fluid Damper Assembly
4838392 6/13/1989 Semi-Active Damper for Vehicles and the Like
4881172 11/14/1989 Observer Control Means for Suspension Systems or the Like
4887699 12/19/1989 Vibration Attenuating Method Utilizing Continuously Variable Semi-Active Damper
4896754 1/30/1990 Electrorheological Fluid Force Transmission and Conversion Device
4898264 2/6/1990 Semiactive Damper with Motion Responsive Valve Means
4907680 3/13/1990 Semiactive Damper Piston Valve Assembly
4921272 5/1/1990 Semi-Active Damper Valve Means with Electromagnetically Movable Discs in the Piston
4923057 5/8/1990 Electrorheological Fluid Composite Structures
4936425 6/26/1990 Method of Operating a Vibration Attenuating System Having Semi-Active Damper Means
4949573 8/21/1990 Velocity Transducer for Vehicle Suspension System
4953089 8/28/1990 Hybrid Analog Digital Control Method and Apparatus for Estimation of Absolute Velocity in Active Suspension Systems
4993523 2/19/1991 Fluid Circuit for Semi-Active Damper Means
5004079 4/2/1991 Semi-Active Damper Valve Means and Method
5007513 4/16/1991 Electroactive Fluid Torque Transmission Apparatus with Ferrofluid Seal
5029823 7/9/1991 Vibration Isolator with Electrorheological Fluid Controlled Dynamic Stiffness
5032307 7/16/1991 Surfactant-Based Electrorheological Materials
5207774 5/4/1993 Valving for a Controllable Shock Absorber
5276622 1/4/1994 System for Reducing Suspension End-Stop Collisions
5276623 1/4/1994 System for Controlling Suspension Deflection
5277281 6/11/1994 Magneto-Rheological Fluid Dampers
5284330 2/8/1994 Magneto-Rheological Fluid Devices
5294360 3/15/1994 Atomically Polarizable Electrorheological Material
5306438 4/26/1994 Ionic Dye-Based Electrorheological Materials
5382373 1/17/1995 Magneto-Rheological Materials Based on Alloy Particles
5390121 2/14/1995 Banded On-Off Control Method for Semi-Active Dampers
5396973 3/14/1995 Variable Shock Absorber with Integrated Controller, Actuator and Sensors
5398917 3/21/1995 Magneto-Rheological Fluid Devices
5417874 5/23/1995 Method for Activating Atomically Polarizable Electrorheological Materials
5492312 2/20/1996 Multi-Degree of Freedom Magneto-Rheological Devices and System for Using Same
5547049 5/31/1994 Magneto-Rheological Fluid Composite Structures
5578238 11/26/1996 Magneto-Rheological Materials Utilizing Surface-Modified Particles
5599474 2/4/1997 Temperature Independent Magneto-Rheological Materials
5645752 7/8/1997 Thixotropic Magneto-Rheological Materials
5652704 7/29/1997 Controllable Seat Damper System and Control Method Thereof
5670077 9/23/1997 Aqueous Magneto-Rheological Materials
5683615 11/4/1997 Magneto-Rheological Fluid
5693004 12/2/1997 Controllable Fluid Rehabilitation Device Including a Reservoir of Fluid
5711746 1/6/1998 Organomolybdenum-Containing Magneto-Rheological Fluid
5711746 1/27/1998 Portable Controllable Fluid Rehabilitation Devices
5712783 1/27/1998 Control Method for Semi-Active Damper
5816372 10/6/1998 Magneto-Rheological Fluid Devices and Process of Controlling Force in Exercise Equipment Utilizing Same
5842547 12/1/1998 Controllable Brake
5878851 3/9/1999 Controllable Vibration Apparatus
5900184 5/4/1999 Method and Magneto-Rheological Fluid Formulations for Increasing the Output of a Magneto-Rheological Fluid Device
5906767 5/25/1999 Magneto-Rheological Fluid
5947238 9/7/1999 Passive Magneto-Rheological Fluid Device with Excursion Dependent Characteristic
5964455 10/12/1999 Method for Auto Calibration of a Controllable Damper Suspension System
5993358 6/30/1999 Controllable Platform Suspension System for Treadmill Decks and the Like and Devices Thereof
6027633 10/17/2000 Aqueous Magneto-Rheological Fluid with High Stability and Redispersion Capability
6027664 2/22/2000 Method and Magneto-Rheological Fluid Formulations for Increasing the Output of a Magneto-Rheological Fluid
6070681 6/6/2000 Controllable Cab Suspension
6095486 8/1/2000 Two-Way Magneto-Rheological Fluid Valve Assembly and Devices Utilizing Same
6117093 9/12/2000 MR Portable Hand and Wrist Rehabilitation Device
6131709 10/17/2000 MR Adjustable Valve and Vibration Damper Utilizing Same
6132633 10/17/2000 Aqueous Magneto-Rheological Material
6151930 11/28/2000 Washing Machine Having a Controllable Field Responsive Damper
6158470 12/12/2000 Two-Way Magneto-Rheological Fluid Valve Assembly and Devices Utilizing Same
6158910 12/12/2000 Magneto-Rheological Grip for Handheld Implements
6186290 2/13/2001 Magneto-Rheological Fluid Brake with Integrated Flywheel
6202806 3/20/2001 Controllable Device Having a Matrix Medium Retaining Structure
6203717 3/20/2001 Stable Magneto-Rheological Fluids
6234060 5/22/2001 Low Cost Servo-Positioning Systems Using MR Fluid Devices
6283859 9/4/2001 Magnetically-Controllable, Active Haptic Interface System and Apparatus
6296088 10/2/2001 Magneto-Rheological Fluid Seismic Damper
6302249 10/16/2001 Linear-Acting Controllable Pneumatic Actuator And Motion Control Apparatus Including a Field Responsive Medium and Control Method Thereof
6308813 10/30/2001 MR Fluid Controlled Interlock Mechanism
6311110 10/30/2001 Adaptive Off-State Control Method
6339419 1/15/2002 Magnetically-Controllable, Semi-Active Haptic Interface System and Apparatus
6340080 1/22/2002 Apparatus Including a Matrix Structure and Transmission
6373465 4/16/2002 Magnetically-Controllable, Semi-Active Haptic Interface System and Apparatus
6378671 4/30/2002 Magnetically Controlled Friction Damper and Use Thereof
6382604 5/7/2002 Method for Adjusting the Gain Applied to a Seat Suspension Control Signal
6394239 5/28/2002 Controllable medium device and apparatus utilizing same
6395193 5/28/2002 Magneto-Rheological compositions
6427813 8/6/2002 Magneto-Rheological fluid devices exhibiting settling stability
6475404 11/5/2002 Instant magnetorheological fluid mix
6547986 4/15/2003 Magneto-Rheological grease composition
6611185 8/26/2003 Magneto-Rheological fluid based joint
D473950 4/29/2003 Combined container and field responsive material
6695105 2/24/2004 Magneto-Rheological twin-tube damping device
1196929/EP-B1 2/25/2004 Stable Magneto-Rheological Fluids
6776518 8/17/2004 Container for transporting and storing field controllable fluid
6854573 2/15/2005 Brake with field responsive material
6886819 5/3/2005 MR fluid for increasing the output of a magnetorheological fluid damper
7040467 5/9/2006 Magnetorheological actuated friction damper
7070707 7/4/2006 Magnetorheological composition
7087184 8/8/2006 MR fluid for increasing the output of a magnetorheological fluid device
CASE STUDY
Bringing a smoother ride to GM customers. Using LORD Corporation’s proprietary magneto-rheological (MR) fluid technology, Delphi Corporation’s MagneRide™ system incorporates MR fluid-based monotube shock absorbers with a sensor set and an onboard controller.
[more]

 
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