MODULAR FOAM DISPENSER

A dispenser for mixing foam precursor chemicals and dispensing the foamable mixture includes a first module containing shutoff valves and a second module containing a dispensing valve assembly. The dispensing valve assembly includes a valve body of a self-lubricating material and a valving rod which...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BETRAM, GEORGE, TEOFILIUS, LEE, WILLIAM, CORRIGAN, JOHN, JOSEPH, III, FLEMING, ROBERT, N
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ATOMISING APPARATUS 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 HANDLING THIN OR FILAMENTARY MATERIAL INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS MAKING GRANULES OR PREFORMS NOZZLES PACKAGES PACKAGING ELEMENTS PACKING PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL STORING TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	A dispenser for mixing foam precursor chemicals and dispensing the foamable mixture includes a first module containing shutoff valves and a second module containing a dispensing valve assembly. The dispensing valve assembly includes a valve body of a self-lubricating material and a valving rod which is reciprocatingly retracted in a valve passage of the valve body to uncover orifices which supply the precursor fluids into the valve passage, from which the mixed chemicals are dispensed. The dispensing valve assembly includes a die spring which urges a washer to compress the valve body along its axis to help prevent cold flow of the valve body away from the valving rod. The valving rod is scraped by inner surfaces of the hole in the washer through which the valving rod is retracted and extended. The die spring is preloaded and retained by a load cylinder which is fixed in the bore in the second housing which contains the dispensing valve.