Patents by Inventor Randal Ray Schaefer

Randal Ray Schaefer 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).

  • Internal sleeve with a plurality of lands and teeth
    Patent number: 5667252
    Abstract: A repair sleeve for installation in a parent tube by a sleeve expander of the type operable between an expanded state and an unexpanded state. The sleeve includes an elongated sleeve member having an outer wall and a bore sized and configured to receive the sleeve expander when the sleeve expander is in the unexpanded state. An engagement structure extends radially outward from the outer wall of the sleeve member for engagement with the interior surface of the parent tube. The engagement structure includes a plurality of circumferential teeth located along the outer wall of the sleeve member and at both ends of the sleeve member which are inclined to each other with respect to each of the ends. A plurality of peripheral lands are formed on the outer wall of the sleeve member, wherein the plurality of teeth are disposed between at least two of the peripheral lands located at each end of the sleeve.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: September 16, 1997
    Assignee: Framatome Technologies, Inc.
    Inventors: Bruce William Schafer, Mark Aaron Sloman, Stanley Mark Gryder, Randal Ray Schaefer