Patents by Inventor Qiyue Chia Jiang

Qiyue Chia Jiang 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).

  • Ferroelectric relaxor actuator for an ink-jet print head
    Patent number: 5790156
    Abstract: A ferroelectric relaxor ceramic actuator material, such as lead magnesium niobate ("PMN"), has high electromechanical conversion efficiency, exhibits wide operating and manufacturing temperature ranges, does not require permanent polarization, and provides useful mechanical activity with reduced electrical drive voltages. A PMN actuator (66) may be bonded to an actuator diaphragm (64) with a high temperature soldering or brazing process. PMN material also has a diffuse Curie point range in which the dielectric constant (40), "d" coefficient (32), and dielectric loss (42) characteristics all rise to a peak and then fall as the temperature increases. A phase-change ink-jet print head (50) employs a PMN actuator that is compounded with lead titanate ("PT") to increase the temperature (T.sub.M) at which the peak dielectric constant occurs.
    Type: Grant
    Filed: April 22, 1997
    Date of Patent: August 4, 1998
    Assignee: Tektronix, Inc.
    Inventors: Jon C. Mutton, Hue P. Le, Qiming Zhang, Ronald L. Adams, L. Eric Cross, Thomas R. Shrout, Qiyue Chia Jiang