Patents by Inventor Andrew S. Toth

Andrew S. Toth 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).

  • Fluid metering verification system
    Patent number: 5315294
    Abstract: A positive verification of fluid flow from a reservoir through a metering pump is provided by monitoring the downstream fluid pressure fluctuations caused in the fluid conduit by inserting a pressure sustaining valve in it. A pressure switch or similar device coacts with a pulse timer to monitor the periodic pressure fluctuations in the conduit. A lapse in the periodic pressure fluctuations for a specified time allows the timer to activate an alarm signal.
    Type: Grant
    Filed: November 18, 1992
    Date of Patent: May 24, 1994
    Assignee: Metex Corporation Limited
    Inventor: Andrew S. Toth