Accurate dosing pump

Details Accurate dosing pump Accurate dosing pump

2006-11-07

2006-11-07

Look, Edward K. (Department: 3751)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S380000, C222S385000

Reexamination Certificate

active

07131559

ABSTRACT:
With the subject invention, a pump is formed that generally includes a reservoir formed to accommodate at least one fluid dose, and a fluid-collecting chamber in fluid communication with the reservoir. The fluid-collecting chamber includes a dose-control portion which encompasses a volume defined by two dimensions. A first piston is disposed to urge fluid from the reservoir and at least into the dose-control portion. A second piston is disposed to reversibly slide within at least the dose-control portion of the fluid-collecting chamber. A nozzle is also provided which is located such that fluid displaced by the second piston from the dose-control portion is generally urged towards the nozzle. A check valve may be placed in the fluid path between the dose-control portion and the nozzle.

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patent: 2005/0023300 (2005-02-01), Schultz

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