Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Post sintering operation
Reexamination Certificate
2007-09-21
2011-12-06
Wyszomierski, George (Department: 1733)
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Post sintering operation
C419S038000, C419S066000
Reexamination Certificate
active
08071016
ABSTRACT:
A method is disclosed of forming a powder metal compact. Powder metal is placed in an annular space of a compaction die tool set in which the annular space has inner and outer cylindrical surfaces that form inner and outer cylindrical surfaces of the powder metal compact. An elastomeric tool has a first cylindrical surface adjacent to a fixed cylindrical surface of the compaction die tool set that is radially fixed and further has a second cylindrical surface, opposite to the first cylindrical surface, that touches the powder metal. The powder metal is compressed to form the powder metal compact by applying an external axial force on the elastomeric tool while maintaining the diameter of the fixed cylindrical surface so as to cause the elastomeric tool to compress the second cylindrical surface of the elastomeric tool against the powder metal.
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Campbell Timothy M.
Cooper Donald D.
Knott Henry J.
Mandel Joel H.
Phillips Donald J.
GKN Sinter Metals LLC
McGuthry Banks Tima M
Quarles & Brady LLP
Wyszomierski George
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