Injection valve comprising a pump piston

Details Injection valve comprising a pump piston Injection valve comprising a pump piston

2006-02-14

2006-02-14

Nguyen, Dinh Q. (Department: 3752)

Fluid sprinkling, spraying, and diffusing

Unitary injection nozzle and pump or accumulator plunger

Accumulator plunger biased to discharge fluid

C239S092000, C239S093000, C239S095000, C239S533400, C239S102200, C137S630140

Reexamination Certificate

active

06997392

ABSTRACT:
The invention relates to an injection valve (1) comprising a booster piston (23), said piston delimiting a pump chamber (22) and a booster chamber (29). A valve (14) is provided in the inlet to the chamber (22). The valve is configured as a 3/2-way valve and controls the pressure in the pump chamber (22). The pressure in the pump chamber (22) is converted into a correspondingly increased pressure in the booster chamber (29) and in an injection chamber (34) containing an injection needle (6), by means of the booster piston (23). The use of the valve (14) allows a precise control of the injection times.

REFERENCES:
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patent: 5709341 (1998-01-01), Graves
patent: 5871155 (1999-02-01), Stockner et al.
patent: 5873527 (1999-02-01), Pattanaik et al.
patent: 6079636 (2000-06-01), Rembold et al.
patent: 6119960 (2000-09-01), Graves
patent: 19517578 (1995-11-01), None
patent: 19701879 (1998-07-01), None
patent: 19910970 (2000-09-01), None

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