Patents by Inventor Carlyle J. Martin

Carlyle J. Martin 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).

  • Seal assemblies for water well casings
    Patent number: 3998245
    Abstract: An economical easily-installable and easily-removable seal assembly for use on water well casings comprises a dome having a vertically-movable central shaft fastened to a lower flange means so that rotation of a nut to lift the shaft compresses a rubber ring between the flange means and a lower rim of the dome, radially expanding the ring to grip the inside of a well casing with uniform pressure around the periphery of the ring, and also compresses an upper ring between the dome and the shaft.
    Type: Grant
    Filed: July 14, 1975
    Date of Patent: December 21, 1976
    Inventor: Carlyle J. Martin
  • Seal assemblies for water-well casings
    Patent number: 3963054
    Abstract: A seal for the upper ends of waterwell casings includes a pair of cup-like devices, one inside the other, which extend over the end of the casing, and a central shaft which urges the cup devices apart to expand a rubber seal ring tightly against the outer periphery of the well casing.
    Type: Grant
    Filed: September 17, 1975
    Date of Patent: June 15, 1976
    Inventor: Carlyle J. Martin