B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/184
B21D 26/02 (2006.01) B21D 11/10 (2006.01) B21D 11/18 (2006.01) B21D 53/88 (2006.01)
Patent
CA 1314133
ABSTRACT Forming hollow, box-section, frame members which include localized reinforcement. The frame members are produced by fitting a sleeve about a tube, deforming the tube and sleeve to avoid the occurrence of pinching on closing of die sections about the deformed tube and sleeve in a sectional die, and then expanding the tube and sleeve in the die to form the hollow, box-section, frame member in which the sleeve is mechanically locked on an inward- ly offset intermediate portion of the tube. The expansion is achieved by application of an internal pressure within the tube.
572582
Ridout & Maybee Llp
Vari-Form Inc.
LandOfFree
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