Apparatus for the proportioned feeding of an analysis fluid

Details Apparatus for the proportioned feeding of an analysis fluid Apparatus for the proportioned feeding of an analysis fluid

1993-01-22

1994-10-18

Kashnikow, Andres

Dispensing

Automatic control

Of dispensers with fluid pressure discharge assistance

222399, 222462, 222504, 222559, B67D 508

Patent

active

053560345

ABSTRACT:
Apparatus for proportioned feeding of an analysis fluid (7) onto a target (5), ejects fluid onto the target in small quantities pulse-wise out of a nozzle (2) through a nozzle outlet opening (3). The apparatus allows the precise proportioning of analysis fluid quanta which are substantially larger than in the case of the "drop on demand" methods commonly used to date for analysis fluids, but are smaller than the minimum doses achievable to date with diluters and dispensers. The apparatus includes a pressure chamber (1) in which the analysis fluid is held under pressure, and a valve unit (11) with a valve opening. A closing element is moved by a positioning element. The valve unit (11) is constructed so that the ejection of the fluid is supported by the movement of the closing element (13) during the closure of the valve opening (23).

REFERENCES:
patent: 3762605 (1973-10-01), Seaton
patent: 4142656 (1979-03-01), Smith et al.
patent: 4177926 (1979-12-01), Hunter
patent: 4203554 (1980-05-01), Zimmer et al.
patent: 4629099 (1986-12-01), Jones
patent: 4714234 (1987-12-01), Falk et al.
patent: 4762277 (1988-08-01), Pater et al.
patent: 4877745 (1989-10-01), Hayes et al.
patent: 4928111 (1990-05-01), Walton
patent: 4962871 (1990-10-01), Reeves
patent: 5065910 (1991-11-01), Fiedler
Patent Abstract of SU-1366-226-A; Auga, 1988 Derwent Publications Ltd.

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