Patents by Inventor Lyell J. Thomas

Lyell J. Thomas 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).

  • Transcutaneous galvanic electrode oxygen sensor
    Patent number: 4664119
    Abstract: A galvanic electrode oxygen sensor which is useful in measuring transcutaneous oxygen pressure (pO.sub.2) contains a cathode in the form of a porous film of a metal below hydrogen in the Electromotive Series, an anode of a metal above hydrogen in the Electromotive Series, an electrolyte and an oxygen-permeable membrane in contact with the cathode and adapted to contact the skin of a patient. The sensor may also contain temperature measuring device or structure for compensating for temperature variations.
    Type: Grant
    Filed: December 4, 1985
    Date of Patent: May 12, 1987
    Assignee: University of Southern California
    Inventors: Samuel P. Bessman, Lyell J. Thomas, Jr., Ennis C. Layne
  • Implantable glucose sensor
    Patent number: 4431004
    Abstract: A method and apparatus for more accurate measurements of the glucose content in body fuids by sensing the absolute level of oxygen concentration in the fluid and correcting the output differential measurement indicative of the glucose content in the fluid according to the absolute level of oxygen.In the two electrode systems known to the art, the unaltered oxygen electrode of the electrode pair may be employed to read the absolute level of oxygen concentration and in addition, function to establish the difference in oxygen concentration caused by glucose oxidation.In view of the fact that temperature may vary, a thermistor may be included in the electrode system to make temperature corrections for reason that the absolute oxygen reading from either a polarographic or galvanic oxygen electrode is extremely sensitive to temperature and the rate of glucose oxidation is temperature sensitive.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: February 14, 1984
    Inventors: Samuel P. Bessman, Ennis C. Layne, Lyell J. Thomas
  • Piezoelectric driven diaphragm micro-pump
    Patent number: 4344743
    Abstract: A piezoelectric driven variable volume having a chamber pump with a flexible tube and a non-compressible fluid therein. Solenoid operated valves are associated with the inlet and outlet of the flexible tube. A control circuit sequences the valves and the piezoelectric drive to pump small volumes of liquid through the flexible tube by a diaphragm-type action.
    Type: Grant
    Filed: December 4, 1979
    Date of Patent: August 17, 1982
    Inventors: Samuel P. Bessman, Lyell J. Thomas, Jr.
  • Micro pump powered by piezoelectric disk benders
    Patent number: 3963380
    Abstract: The pump has a piezoelectric variable volume chamber and a solenoid controlled valve operated in sequence to pump small volumes of liquid. The sequence is produced by developing a phase difference between the control of the piezoelectrical chamber and the solenoid valve.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: June 15, 1976
    Inventors: Lyell J. Thomas, Jr., Samuel P. Bessman