Apparatus for the proportioned feeding of an analysis fluid

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 t...

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Bibliographische Detailangaben
Hauptverfasser:	SCHLUMBERGER, HELMUT
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PHYSICS SPRAYING OR ATOMISING IN GENERAL TESTING THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	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).