Patents by Inventor Robert M. Durham

Robert M. Durham 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).

  • Patent number: 5394940
    Abstract: Rod guides having four axial flutes separating four axial ribs are telescoped over sucker rods for water wells. The bore of the guides have a taper or bell from a tight fitting or snug fitting cylindrical section within the guides toward a bell or flare end. The adhesive fills the annular space between the bell or flare and the sucker rod to form a wedge to attach the guide to the sucker rod. Two guides on each joint of the sucker rod are aligned so that five sucker rods may be formed into a bundle with the guides staggered on different rods of the bundle to prevent interference and so that the rods nest into the flutes of the guides to form a compact bundle before the rods are bundled for shipment.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: March 7, 1995
    Assignee: Amarillo Pump & Supply Company, Inc.
    Inventor: Robert M. Durham