High-pressure pump or injector plug or guide with decoupled...

Internal-combustion engines – Charge forming device – Fuel injection system

Reexamination Certificate

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Details

C123S510000

Reexamination Certificate

active

07628140

ABSTRACT:
A unitary high pressure seal provides a fluid seal against multiple surfaces, at least one of which is static and one of which is dynamically loaded. The seal includes a seal body and separated load and sealing lands. The load land interfaces with the static surface, e.g., a valve assembly barrel, to seal the body to that surface, whereas the sealing land dynamically provides a seal against a variably positioned surface, e.g., a valve head surface. In this manner, when the valve is closed, the load land is not affected by the dynamic loads on the sealing land, and leakage at the static surface is thus minimized.

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