Patents by Inventor William Craft

William Craft 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).

  • PRESSURE SENSOR HAVING TWO MATERIALS WITH DIFFERENT COEFFICIENTS OF THERMAL EXPANSION CONFIGURED TO REDUCE TEMPERATURE DEPENDENCE
    Publication number: 20060244970
    Abstract: An interferometer pressure sensor includes a reflective film configured to change a position thereof responsive to a pressure change and an interferometer element configured to detect the position change of the reflective film. A holder is configured to hold the reflective film and the interferometer element. The holder includes a first member formed of a first material having a first coefficient of thermal expansion and a second member formed of a second material having a second coefficient of thermal expansion that is different from the first coefficient of thermal expansion. The first member and the second member of the holder are sized and configured based on the first coefficient of thermal expansion and the second coefficient of thermal expansion so that a distance between the reflective film and the interferometer element is substantially constant over a temperature range.
    Type: Application
    Filed: April 4, 2006
    Publication date: November 2, 2006
    Inventors: William Craft, Rahul Gupta