Patents by Inventor Michael A. Self

Michael A. Self 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).

  • Liner deterioration warning for fluid movers
    Patent number: 4535326
    Abstract: Method and apparatus for detecting deterioration of a replaceable liner in a pump transporting an electrically conductive fluid medium. A conductive component is isolated, during normal operation, from the conductive fluid medium by the electrically insulative liner. The conductive component is positioned at a predetermined location relative to the liner such that upon a selected degree of wear of the liner, an electrical circuit is completed upon contact of the fluid medium and the conductive member.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: August 13, 1985
    Assignee: Joy Manufacturing Company
    Inventors: Lance A. Mullins, Michael A. Self