Stock material or miscellaneous articles – All metal or with adjacent metals – Having member which crosses the plane of another member
Reexamination Certificate
2005-12-13
2005-12-13
Zimmerman, John J. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Having member which crosses the plane of another member
C428S600000, C428S603000, C148S415000, C148S416000, C148S418000, C148S902000
Reexamination Certificate
active
06974633
ABSTRACT:
An extruded structural member having improved damage tolerance containing a base section (6); a stiffening section having at least one pair of structural stiffeners (10), the structural stiffeners integral with the base section (6) and projecting outwardly thereof; and at least one intra-stiffener (90) area positioned between the pair of structural stiffeners (10), the intra-stiffener area (90) having a microstructure with intentionally increased amounts of fiber texture to reduce the rate of fatigue crack growth in the extruded structural member.
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Bray Gary H.
Denzer Diana K.
Garratt Matthew D.
Ulysse Patrick
Alcoa Inc.
Eckert Seamans Cherin & Mellott , LLC
Maloney D. Mark
Zimmerman John J.
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