Patents by Inventor Qihao Yuan

Qihao Yuan 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).

  • Patent number: 5856638
    Abstract: Weighing apparatus of the electromagnetic load compensation type includes a thermal conductor for transmitting coil heat from the internal region adjacent the air gap of a permanent magnetic field within which the compensation coil is arranged to a remotely-arranged thermal sensor, thereby to dissipate the coil heat and to modify as a function of internal temperature the compensating current that is supplied to the compensation coil. As a consequence of the dissipation of heat from the air gap, heating of the permanent magnet and its pole member is avoided, thereby, to prevent variation of the intensity of the permanent magnet field.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: January 5, 1999
    Assignee: Mettler-Toledo GmbH
    Inventors: Hans-Rudolf Burkhard, Qihao Yuan