Patents by Inventor Frederick Hefren

Frederick Hefren 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).

  • Triplex drilling mud pump fluid driving implement
    Publication number: 20020092418
    Abstract: A fluid driver consisting of a piston support lug having a forward end and a rearward end, a clamp ring engaging disk having a forward end and a rearward end, the rearward end of the piston supporting lug being homogeneously fused with the forward end of the clamp ring engaging disk, the homogeneous fusion extending the rearward end of the piston support lug forwardly from the forward end of the clamp ring engaging disk, the homogeneous fusion resisting fracture, bending, and breakage of the fluid driver.
    Type: Application
    Filed: January 12, 2001
    Publication date: July 18, 2002
    Inventor: Frederick Hefren