Vacuum demand flow valve

A valve is disclosed for dispensing a flowable material from a container. The valve has a first chamber (40) at a first pressure wherein said first chamber (40) defines an outlet (28) in communication with said first chamber (40). A second chamber (42) is at a second pressure. The valve has a stop (...

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Bibliographic Details
Main Authors DANBY HAL, LACY GRAHAM KEITH, WILLIAMSON MARK, SWAN JULIAN
Format Patent
LanguageEnglish
Published 01.04.2004
Edition7
Subjects
ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR
ACTUATING-FLOATS
BABY COMFORTERS
BLASTING
COCKS
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
CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICALPURPOSES
CONVEYING
DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY
DEVICES FOR RECEIVING SPITTLE
DEVICES FOR VENTING OR AERATING
DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGINGPHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL ORADMINISTERING FORMS
DOMESTIC ARTICLES OR APPLIANCES
ENGINEERING ELEMENTS AND UNITS
FURNITURE
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HAND OR TRAVELLING ARTICLES
HANDLING THIN OR FILAMENTARY MATERIAL
HEATING
HOUSEHOLD OR TABLE EQUIPMENT
HUMAN NECESSITIES
HYGIENE
LIGHTING
MECHANICAL ENGINEERING
MEDICAL OR VETERINARY SCIENCE
PACKAGES
PACKAGING ELEMENTS
PACKING
PERFORMING OPERATIONS
SPICE MILLS
STORING
SUCTION CLEANERS IN GENERAL
TAPS
THERMAL INSULATION IN GENERAL
TRANSPORTING
TRAVELLING OR CAMP EQUIPMENT: SACKS OR PACKS CARRIED ON THEBODY
VALVES
WEAPONS
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Summary:A valve is disclosed for dispensing a flowable material from a container. The valve has a first chamber (40) at a first pressure wherein said first chamber (40) defines an outlet (28) in communication with said first chamber (40). A second chamber (42) is at a second pressure. The valve has a stop (18) indexed against a third pressure, operating to selectively place the first chamber (40) into communication with the second chamber (42). The stop (18) is operative to connect the second chamber (42) to said first chamber (40) when the first pressure is less than the third pressure. The valve has structure capable of balancing internal forces acting on the valve such as from pressure from the flowable material in the container.
Bibliography:Application Number: US20030626489