Patents by Inventor Searle, Robin H. J.

Searle, Robin H. J. 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).

  • Flueric partial pressure sensors
    Patent number: 4823593
    Abstract: The temperature range for stable operation of a flueric partial pressure sensor (300) is improved by temperature-responsive means (80, 60) which vary with temperature change the suction applied by a flueric aspirator (27) in drawing gas through sensor bridge legs (12, 13) and a power line (37) of a flueric amplifier (11). The temperature-responsive means may comprise temperature-sensitive adjustment means (107, FIG. 2) embodied in a pressure reducing valve (80) to vary the pressure of working gas supplied by way of delivery line (28) for driving the flueric aspirator. Alternatively or additionally the temperature-responsive means may comprise a temperature-sensitive bleed valve (60) incorporated in a common outlet (14) from the bridge legs and the flueric amplifier power line.
    Type: Grant
    Filed: December 2, 1987
    Date of Patent: April 25, 1989
    Assignee: Normalair-Garrett (Holdings) Limited
    Inventors: Owen D. Furlong, Searle, Robin H. J.