Appeal No. 1999-2399
Application 08/705,798
Since the cross-sectional area on the bent portion 12a is
greater than the cross-sectional area through the flat
portion, it will undergo less deformation for the same amount
of torsion. Thus, the bent section 12a has increased
torsional stiffness. Kikuchi's description of sections 12a as
"low rigidity sections" means that the sections have low
rigidity to bending of the end of the beam in a perpendicular
direction, not that they have low rigidity in all bending or
twisting directions.
Appellants argue that Kikuchi does not teach "said beam
defining a laterally extensive region of perpendicular
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