Metal working – Method of mechanical manufacture – Impeller making
Reexamination Certificate
2007-08-08
2009-06-09
Hong, John C (Department: 3726)
Metal working
Method of mechanical manufacture
Impeller making
C029S525140
Reexamination Certificate
active
07543379
ABSTRACT:
A method of manufacturing an article by diffusion bonding at least two metal components (30,36) comprises assembling the metal components (30,36) into a stack relative to each other so that the surfaces (34,40) are in mating contact. The edges of the metal components (30,36) are sealed together, except for an aperture (49) where a pipe (50) is to be connected. A connector (51) has a first end (52) and a second end (53). The first end (52) has a smaller diameter than the second end (53) and a bore (54) extends through the connector (51) from the first end (52) to the second end (53). The second end (53) of the connector (51) is joined (57) to the stack. The pipe (50) is joined (58) to the first end (52) of the connector (51). The interior of the sealed assembly is evacuated via the pipe (50) and the pipe is sealed. Heat and pressure are applied to diffusion bond the metal components (30,36) together to form an integral structure. The connector (51) reduces the possibility of failure of the pipe (50) and/or seal (57) during diffusion bonding.
REFERENCES:
patent: 7316066 (2008-01-01), Twigg
patent: 2001/0022023 (2001-09-01), Wallis
Hong John C
Manelli Denison & Selter PLLC
Rolls-Royce plc
Taltavull W. Warren
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