Patents by Inventor Yen-Kuei Tsao

Yen-Kuei Tsao 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: 8094427
    Abstract: A system for precisely controlling the operational characteristics of a relay is provided. In one embodiment, the invention relates to a relay having performance characteristics that vary with a temperature of the relay, where the relay comprises a plurality of operational phases including a switching phase and a holding phase, and a relay control circuit configured to provide a preselected current to the relay at least during the switching phase and the holding phase, where the preselected current remains substantially constant despite a change in the temperature of the relay, where the relay is configured to transition from a non-energized position to an energized position during the switching phase, and where the relay is configured to maintain the energized position during the holding phase.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: January 10, 2012
    Assignee: Leach International Corporation
    Inventors: Malcolm J. Critchley, Yen-Kuei Tsao
  • Publication number: 20100177453
    Abstract: A system for precisely controlling the operational characteristics of a relay is provided. In one embodiment, the invention relates to a relay having performance characteristics that vary with a temperature of the relay, where the relay comprises a plurality of operational phases including a switching phase, and a relay control circuit configured to provide a preselected current to the relay at least during the switching phase, where the preselected current remains substantially constant despite a change in the temperature of the relay, and where the relay is configured to transition from a non-energized position to an energized position during the switching phase.
    Type: Application
    Filed: January 15, 2009
    Publication date: July 15, 2010
    Inventors: Malcolm J. Critchley, Yen-Kuei Tsao
  • Patent number: 5615105
    Abstract: A multichannel power distribution system for individually controlling power from a source to a plurality of loads has individual power control devices and at least one logic stage responsive to status signals to impose preselected operational characteristics on the devices. In one embodiment, isolation circuitry is provided between the power control devices and the logic stage. The isolation circuitry then includes a modulator for converting the status signal to a status pulse train of modulated pulse width, and the logic stage includes decoder logic for measuring the pulse width of the status pulse train. In another embodiment, the logic stage is programmable to alter the operational characteristics of the devices in response to external inputs.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: March 25, 1997
    Assignee: Leach Corporation
    Inventors: Farshid Tofigh, Parminder S. Brar, Yen-Kuei Tsao, Evan Clements, Joseph Maier