BLAIR THOMAS ALLISON
Engineers in Grove City, PA
License number
Pennsylvania PE060363
Category
Engineers
Type
Professional Engineer
Address
Address
Grove City, PA 16127
Professional information
Blair Allison
Specialties:
Engineering
Work:
Grove City College
Forming Of Hollow Extrusions With Double Plane Bends And Twists
US Patent:
6260398, Jul 17, 2001
Filed:
Feb 11, 2000
Appl. No.:
9/502684
Inventors:
Larry W. Cisko - Harrison City PA
Blair T. Allison - Grove City PA
William A. Graham - McDonald PA
Paul E. Ringbloom - Murrysville PA
Blair T. Allison - Grove City PA
William A. Graham - McDonald PA
Paul E. Ringbloom - Murrysville PA
Assignee:
Alcoa Inc. - Pittsburgh PA
International Classification:
B21D 2502, B21D 1114
US Classification:
72302
Abstract:
A method and apparatus for forming hollow extrusions. Specifically, a method and apparatus for imparting one or more bends and/or twists in a hollow extrusion under stretch. The apparatus may perform all of these formation and stretch functions as the result of one single physical or mechanical force imparted on the apparatus from either an internal or an external source. The forming apparatus and method may provide an easy way to mount and/or dismount the hollow extrusion form the machine by way of separate or integral gripper mounts. The single-force stretch-bend-twist apparatus may be used in a mass production manufacturing environment where the machine and method can perform complex formation steps and may automatically reset itself back to a starting position after formation.