Magnetorheological fluid damper

A screw-type magnetorheological damper, comprising:

• a thrust shaft comprising an external threaded surface in threaded communication with a sealed housing, wherein at least one end of the thrust shaft extends from the housing;
• a plurality of rotors and stators alternatingly arranged in the housing, wherein the plurality of rotors comprise a planar surface with a centrally located aperture that is rotatably engaged with the threaded surface of the thrust shaft, wherein the plurality of stators is fixedly attached to the housing and comprises a centrally located aperture dimensioned to accommodate vertical movement of the thrust shaft and a planar surface substantially parallel to the planar surface of the at least one rotor, and wherein alternating stators comprises a permanent magnet or an electromagnet;
• and
• a magnetorheological fluid disposed in a space defined by the plurality of rotors and stators.

A magnetorheological damper, the damper comprising:

• a cylindrically shaped housing;
• a magnetorheological fluid disposed in the cylindrically shaped housing;
• a piston assembly disposed within the cylindrically shaped housing in sliding engagement with the cylindrically shaped housing defining a first chamber and a second chamber, wherein the piston assembly comprises an annular starburst flow channel extending from the first chamber to the second chamber, and an electromagnet centrally disposed in the piston assembly, and
• a power supply in electrical communication with the electromagnet.