Metal deforming – By application of fluent medium – or energy field – Using fixed die
Reexamination Certificate
2008-05-13
2008-05-13
Jones, David B (Department: 3725)
Metal deforming
By application of fluent medium, or energy field
Using fixed die
C072S062000, C072S370220, C029S421100
Reexamination Certificate
active
11255733
ABSTRACT:
A method of making a variable thickness tubular member for a vehicle includes the steps of providing a tubular member and positioning a mandrel inside of the tubular member. The method also includes the steps of hydroforming the tubular member into a variable thickness tubular member having a variable wall thickness along its perimeter.
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GM Global Technology Operations Inc.
Jones David B
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