Patents by Inventor Eva Wadman

Eva Wadman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Magnetoelastic contactless torque transducer with a shaft with a duplex anisotropic microstructure
    Patent number: 5574231
    Abstract: A magnetoelastic torque transducer for electrically measuring torsional stresses in a shaft (1) which is provided with at least one zone (6, 7) with an anisotropy the effect of which is to deflect the magnetic flux density in a direction away from the natural direction along the shaft and where the shaft is of a material which has a geometrically anisotropic microstructure with at least two phases, of which one phase consists of relatively soft-magnetic continuous streaks with magnetoelastic properties and at least one phase has a considerably lower permeability, the deflection of the magnetic flux density in the zone/zones being achieved by mechanically distorting the shaft within the zone/zones.
    Type: Grant
    Filed: September 12, 1995
    Date of Patent: November 12, 1996
    Assignee: Asea Brown Boveri AB
    Inventors: Kent Blomkvist, Eva Wadman