Metal deforming – Process – Tube making or reshaping
Patent
1997-10-21
1999-07-27
Larson, Lowell A.
Metal deforming
Process
Tube making or reshaping
298973, B21D 4100
Patent
active
059271388
ABSTRACT:
A method of forming a structural member from a tubular member having a hollow interior. The method includes cutting a pair of slots in the tubular member. The slots extend from a free end of the tubular member and generally longitudinally with respect thereto. The slots are located generally opposite one another. The method further includes inserting a platen edgewise into the slots so that the platen extends across the hollow interior of the tubular member from one slot to the other slot. The platen has a thickness less than the width of the slots. opposing end portions of the tubular member are radially compressed against opposite faces of the platen to form two generally parallel plates projecting endwise from the tubular member. The plates are spaced apart a distance generally equal to the thickness of the platen.
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patent: 4088001 (1978-05-01), Ishikawa et al.
patent: 4621421 (1986-11-01), O'Loughlin
patent: 5333485 (1994-08-01), Ublacker
Larson Lowell A.
McDonnell Douglas Corporation
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