Patents by Inventor Ronald G. S. Sale

Ronald G. S. Sale 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 selective automatic bilge pump control
    Patent number: 4804936
    Abstract: A highly reliable bilge pump control system which distinguishes between oil and water and operates without a mechanical float switch. It uses a conductivity type probe of special construction which is unaffected by sludge and contamination at the oil-water interface. Multiple probes at varying depths feed high impedance operational amplifiers which operate a conventional pump through digital circuitry which assures that no oil is pumped from the bilge.
    Type: Grant
    Filed: March 25, 1987
    Date of Patent: February 14, 1989
    Assignee: Saler Electronic Systems, Inc.
    Inventor: Ronald G. S. Sale