Fuel injector check valve

Details Fuel injector check valve Fuel injector check valve

2006-10-24

2006-10-24

Yu, Justine R. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Fluid pressure responsive discharge modifier* or flow...

Fuel injector or burner

C239S088000, C239S102200, C239S533300, C239S569000, C239S900000

Reexamination Certificate

active

07124966

ABSTRACT:
A high pressure unit fuel injector includes a member with a fuel delivery opening to be intermittently supplied with high pressure fuel and a valve seat encircling the fuel delivery opening. A valve cage includes a check-valve chamber adjacent the valve seat. The chamber includes an annular ledge facing the valve seat and an inwardly facing wall surrounding the ledge. A disk is located within the chamber and has opposite first and second faces alternately seatable against the valve seat and the ledge respectively. The disk has a plurality of openings between the first and second faces and a circular-shaped groove formed in the first face about a center of the disk. The groove intersects the plurality of openings.

REFERENCES:
patent: 3249308 (1966-05-01), Cadiou
patent: 3379374 (1968-04-01), Mekkes
patent: 3403632 (1968-10-01), Hulsing
patent: 5251871 (1993-10-01), Suzuki
patent: 5328094 (1994-07-01), Goetzke
patent: 5797427 (1998-08-01), Buescher
patent: 6817546 (2004-11-01), Battistini et al.
patent: 6881331 (2005-04-01), Barnes

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