Improvements in metering valves for pressurised dispensing containers

A metering valve for use with a pressurised dispensing container, the metering valve comprising a valve stem assembly 11 co-axially slidable within an annular metering chamber 13 defined between the valve stem assembly and a substantially cylindrical chamber body 12, the metering valve further compr...

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Bibliographic Details
Main Author TWYMAN PAUL
Format Patent
LanguageEnglish
Published 05.09.2007
Subjects
ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR
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
PACKAGES
PACKAGING ELEMENTS
PACKING
PERFORMING OPERATIONS
STORING
TRANSPORTING
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Summary:A metering valve for use with a pressurised dispensing container, the metering valve comprising a valve stem assembly 11 co-axially slidable within an annular metering chamber 13 defined between the valve stem assembly and a substantially cylindrical chamber body 12, the metering valve further comprising an outer seal 17 extending between the valve stem assembly and the chamber body to seal off an outer duct of the valve stem assembly from the metering chamber when the valve stem assembly is in a non-dispensing position and an inner seal 18 extending between the valve stem assembly and the chamber body. The valve stem assembly comprising a straight, central passage 24 extending from an open inner end of the valve stem assembly to a mid-point of the valve stem assembly located longitudinally within the metering chamber. The valve stem assembly further comprises at least two elongated openings 40 in a wall of the valve stem assembly to allow radially-directed flow between an exterior of the valve stem assembly and the central passage, the elongated openings being located to extend either side of the inner seal when the valve stem assembly is in the non-dispensing position.
Bibliography:Application Number: CN200580033221