Metal working – Method of mechanical manufacture – Valve or choke making
Reexamination Certificate
2011-04-26
2011-04-26
Bryant, David P (Department: 3726)
Metal working
Method of mechanical manufacture
Valve or choke making
C029S888400, C219S121630, C219S121640, C123S470000
Reexamination Certificate
active
07930825
ABSTRACT:
A method for reducing “blow-out” of annular welds for attaching press-fit components in a fuel injector assembly is disclosed. The method employs a multi-step welding procedure whereby a first annular weld bead that corresponds to less than 360° of rotation of the assembly about a longitudinal axis leaves a radial void that is thereafter sealed with a second annular weld bead. In an alternative embodiment, a relief region is formed on radially-facing surfaces of the components, the relief region being disposed adjacent to a press-fit region. A sealed gap is thereby formed in the relief region between the welds and the press-fit region. The sealed gap provides a further means for expansion of trapped gases that could otherwise “blow out” the liquid weld bead.
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Fochtman James Paul
Oliver Jack David
Bryant David P
Continental Automotive Systems US Inc.
Walters Ryan J
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