DISPOSABLE PUMP WITH SUCK-BACK MECHANISM

A disposable pump for liquid dispensing includes a chamber in which pressure may be varied for pumping liquid from a compressible container to the chamber to a dispensing opening. The chamber encloses an inner valve that regulates liquid flow between the container and the chamber, and an outer valve...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	NILSSON, HUGO
Format:	Patent
Sprache:	eng ; pol
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS COFFEE MILLS CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS CONVEYING DOMESTIC ARTICLES OR APPLIANCES FURNITURE HANDLING THIN OR FILAMENTARY MATERIAL HUMAN NECESSITIES NOZZLES PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR SPICE MILLS SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL STORING SUCTION CLEANERS IN GENERAL TOILET ACCESSORIES TRANSPORTING
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Beschreibung
Zusammenfassung:	A disposable pump for liquid dispensing includes a chamber in which pressure may be varied for pumping liquid from a compressible container to the chamber to a dispensing opening. The chamber encloses an inner valve that regulates liquid flow between the container and the chamber, and an outer valve regulates flow of liquid between the chamber and the dispensing opening. The pump has a closed position where liquid is drawn from the container to the chamber by negative pressure in the chamber. To dispense, a volume of liquid is drawn from the chamber to the dispensing opening. The inner valve is a one-way valve openable to flow liquid in the dispensing direction when inner valve opening pressure acts in the dispensing direction, and closes for pressure acting in the opposite direction. The outer two-way valve opens to flow liquid in the dispensing or opposite direction.