Device and method for dosing small amounts of liquid

Details Device and method for dosing small amounts of liquid Device and method for dosing small amounts of liquid

2008-07-08

2008-07-08

Warden, Jill (Department: 1797)

Chemical apparatus and process disinfecting, deodorizing, preser

Control element responsive to a sensed operating condition

C422S091000, C422S105000, C422S105000, C222S052000, C222S071000, C222S080000, C347S020000, C436S180000

Reexamination Certificate

active

10250607

ABSTRACT:
A microdosage device comprises a media reservoir used for accommodating a liquid to be dosed, a nozzle connected via a connecting channel to the media reservoir and adapted to be filled via said connecting channel with the liquid to be dosed, and a drive unit for applying, when actuated, to a liquid contained in the media reservoir and in the nozzle a force of such a nature that a substantially identical pressure will be exerted on said liquid contained in the media reservoir and in the nozzle. Flow resistances of the connecting channel and of the nozzle are dimensioned such that, in response to an actuation of the drive unit, a volumetric flow in the connecting channel will be small in comparison with a volumetric flow in the nozzle, said volumetric flow in the nozzle causing an ejection of the liquid to be dosed from an ejection opening of the nozzle.

REFERENCES:
patent: 4537231 (1985-08-01), Hasskamp
patent: 5593290 (1997-01-01), Greisch et al.
patent: 6116297 (2000-09-01), Feygin
patent: 6354471 (2002-03-01), Fujii
patent: 199 17 029 (2000-11-01), None
International Examination Report dated Apr. 5, 2004.

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