Patents by Inventor Ramey Lee Brown, executor

Ramey Lee Brown, executor 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).

  • Check valve assembly
    Patent number: 4040441
    Abstract: A check valve assembly for use in a drill string to prevent reverse flow of drilling fluid through the string while permitting such fluid to be pumped downwardly through the well under normal conditions. The assembly includes: a valve body; a ball valve member, normally located out of the flow path in a side recess; a valve seat located above the valve member and means for controlling the rate of reverse flow of fluid required to move the valve member out of the side recess and against the valve seat.
    Type: Grant
    Filed: August 8, 1974
    Date of Patent: August 9, 1977
    Inventors: Cicero C. Brown, deceased, Joe Russell Brown, executor, Ramey Lee Brown, executor