Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2006-09-28
2010-06-01
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S402020, C029S402080, C415S174500, C277S412000
Reexamination Certificate
active
07726021
ABSTRACT:
A method for repairing damaged fins in a labyrinth seal without the use of welding or metallurgical bonding by removing a section of the shaft containing the damaged fins, and providing a sleeve with replacement fins.
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Bryant David P
Ogilvy Renault LLP
Pratt & Whitney Canada Corp.
Walters Ryan J
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