Patents by Inventor Gregory J. Primavesi

Gregory J. Primavesi 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).

  • Liquid level sensor
    Patent number: 4316183
    Abstract: A high liquid level sensor comprising a tubular probe, with a peripheral wall (6), and arranged to be suspended in a liquid container. An ultrasonic signal is transmitted around the wall (6) from a transmitting transducer (12) potted in a block (11), which is bonded to the inner surface of the wall, to a receiving transducer also potted in the block. A detector circuit connected to the receiving transducer via a lead (10) discriminates between the signal level when the probe is immersed in gas and the lower signal level when the probe is immersed in liquid, and provides a corresponding switched output.
    Type: Grant
    Filed: October 24, 1980
    Date of Patent: February 16, 1982
    Assignee: Bestobell Mobrey Limited
    Inventors: Stuart B. Palmer, Gregory J. Primavesi