Patents by Inventor Fred M. Winn, Jr.

Fred M. Winn, Jr. 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).

  • Suction valve for high pressure slurry pump
    Patent number: 5230363
    Abstract: Where on the valve seating surfaces due to the high pressure pumping of abrasive slurry through an in-line valve is greatly reduced by providing first and second valve seating surfaces which are engaged, respectively by first metal and first elastomeric closure surfaces and second metal and elastomeric closure surfaces located on an annular valve closure means. Pumping efficiency is maintained by providing for high velocity sweep in an annular space between the annular valve closure means and the cylinder in which it rides.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: July 27, 1993
    Assignee: Dowell Schlumberger Incorporated
    Inventors: Fred M. Winn, Jr., Donald C. Cameron, Larry J. Leising
  • Ball injector
    Patent number: 4111334
    Abstract: This invention relates to an apparatus for dispensing ball-like objects and more particularly to an apparatus with a grooved longitudinally disposed member and a surrounding sleeve having a helical inwardly extending rib therein rotatably mounted around the sleeve, the objects being dispensed by the rib pushing them along the groove and out of the apparatus as the sleeve is rotated.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: September 5, 1978
    Assignee: The Dow Chemical Company
    Inventors: Fred M. Winn, Jr., Monty E. Harris