Leak arrest volume for reducing component separation and...

Details Leak arrest volume for reducing component separation and... Leak arrest volume for reducing component separation and...

2005-04-19

2005-04-19

Scherbel, David A. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S124000, C239S533200, C239S585100

Reexamination Certificate

active

06880766

ABSTRACT:
Particularly in the fuel injector art, two components may define a high pressure space that is sealed against leakage via a planar sealing land between the two components. If a leak develops in the planar contact area between the two components, it can act to wedge the two components apart, which tends to exacerbate the leakage problem, and so on. Since some leakage between the two components is almost inevitable for a variety of reasons known in the art, a strategy that arrests the leak before it can produce the component separating wedge affect would be beneficial. This can be accomplished by positioning a leak arrest volume, which may be vented, around a majority of the perimeter of the high pressure space. The usage of a leak arrest volume finds particular application in fuel injectors, especially a class of common rail fuel injectors that are maintained at high pressure during prolonged periods between injection events.

REFERENCES:
patent: 5474234 (1995-12-01), Maley
patent: 5803369 (1998-09-01), Toyao et al.
patent: 5897058 (1999-04-01), Coldren et al.
patent: 5901686 (1999-05-01), Stockner et al.
patent: 5992768 (1999-11-01), Beatty et al.
patent: 6260776 (2001-07-01), Popp
patent: 6666390 (2003-12-01), Itou

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