Patent ID: 6684921
Filing Date: 2004-02-03
Classification: B67D

Abstract:
A liquid supply nozzle comprising:an inlet; a discharge pipe having a free end; a main valve provided between said inlet and said discharge pipe; an air passage provided in said discharge pipe, said air passage having an opening in said discharge pipe adjacent the free end; a negative pressure forming member provided downstream of said main valve and forms a negative pressure zone; a valve open/close mechanism having a diaphragm chamber determined by a diaphragm member and a cap, said diaphragm chamber containing an urging member which presses said diaphragm member, said diaphragm chamber communicating with said air passage and said negative pressure zone, said valve open/close mechanism holding said main valve open, and closing said main valve by movement of said diaphragm member opposing said urging member when a predetermined amount of liquid is supplied; and a liquid supply backup comprising a compulsory liquid supply suspension mechanism provided in said valve open/close mechanism and configured to suspend liquid supply when said valve open/close mechanism fails to close said main valve, said compulsory liquid supply suspension mechanism being a press member provided at a space beneath said diaphragm member, said press member being adapted to enlarge so as to move said diaphragm member opposing said urging member when said press member absorbs liquid leaked through said diaphragm member.