Patents by Inventor Gary Demartelaere

Gary Demartelaere 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).

  • Method and apparatus for bulge forming and bending tubes
    Patent number: 5823031
    Abstract: There is provided a device and manner for bulge forming and bending a tube or hollow extrusion, such as a pipe or conduit. The one portion of the length of the tube is bulge-formed to define a radially expanded, contoured section of the tube, while another portion of the tube length is bent to define an angle or curve in the tube. The device employs a radially expandable mandrel which serves both as the expandable member for bulge-forming the tube, as well as a bending mandrel to stabilize the tube against wrinkling or collapse during bending.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: October 20, 1998
    Assignee: Tools for Bending, Inc.
    Inventors: Larry D. Campbell, Gary Demartelaere, Ronald R. Stange