Accurate dosing pump

Details Accurate dosing pump Accurate dosing pump

2006-01-31

2006-01-31

Look, Edward K. (Department: 3751)

Dispensing

With discharge assistant

With material supply container and discharge assistant with...

C222S380000, C222S385000

Reexamination Certificate

active

06991137

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.

REFERENCES:
patent: 2781953 (1957-02-01), Sylvander
patent: 4995867 (1991-02-01), Zollinger
patent: 5190191 (1993-03-01), Reyman
patent: 5340289 (1994-08-01), Konieczynski et al.
patent: 5556268 (1996-09-01), Topper et al.
patent: 5816455 (1998-10-01), Alpers
patent: 5957338 (1999-09-01), Lehmann
patent: 6010036 (2000-01-01), Bougamont et al.
patent: 6158621 (2000-12-01), Keller
patent: 6196424 (2001-03-01), Bougamont et al.
patent: 6467579 (2002-10-01), Simon

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