Internal-combustion engines – Charge forming device – Fuel injection system
Reexamination Certificate
2007-05-08
2007-05-08
Moulis, Thomas (Department: 3747)
Internal-combustion engines
Charge forming device
Fuel injection system
C138S109000, C285S386000
Reexamination Certificate
active
11217866
ABSTRACT:
A high pressure fuel injection tube includes a connection head with a seat face in a spherical shape. A ring-like flange is spaced from the seat face in an axial direction. A conical portion is formed in the interval between the ring-like flange and the seat face. An undercut bent recess groove with a ring-like shape and a deep depth is formed on the conical portion. Thus, a shallow smooth ring-like recess groove is formed on an inner side of the connection head, and a compressive residual stress is present at an inner peripheral face of the ring-like groove.
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Casella Anthony J.
Hespos Gerald E.
Moulis Thomas
Usui Kokusai Sangyo Kaisha Limited
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