Tools for Bending, Inc.

Larry D Campbell

Ronald R Stange

Gary E Demartelaere

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.

Growing community of inventors

Littleton, CO, United States of America

Larry D Campbell