Dual travel seated pin valve assembly

Details Dual travel seated pin valve assembly Dual travel seated pin valve assembly

2007-01-23

2007-01-23

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

C239S092000, C239S533200, C239S585100, C239S102200, C137S625270, C137S625650, C251S129180

Reexamination Certificate

active

10209218

ABSTRACT:
When an engine is cold-started, the engine oil is quite viscous and requires larger passageways to flow through the engine than when the engine is warmed up and the engine oil flows readily. The present invention relates to a pin valve assembly which may be used on a fuel injector of an engine. The pin valve assembly of the present invention includes a movable shuttle which allows for a relatively large fluid flow space within the pin valve assembly when the engine is cold, and then moves to reduce the fluid flow space when the engine oil is less viscous and requires less room to flow as desired. Therefore, the advantages of a relatively large fluid flow space as well as a shorter pin travel distance within the pin valve assembly are both preserved.

REFERENCES:
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patent: 6237857 (2001-05-01), Ausman et al.
patent: 6390385 (2002-05-01), Hardy et al.

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