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US 6,684,921 B2Granted
Liquid supply nozzle
AssigneeTatsuno Corporation
InventorHiyoshi Tatsuno
Life of this patent
Estimating the term…
Abstract
A liquid supply nozzle having automatic shut-down and alarming function will stop feeding a liquid when a diaphragm is damaged with alarming the damage. The liquid supply nozzle can contain a press member under the diaphragm which pushes up the diaphragm and maintains an entire stoppage function to work even when the diaphragm is broken. The damage of the diaphragm can be visually inspected through a cap which is made of a substantially transparent material and visually or sonically perceived through an additionally provided alarm unit.
Claims17
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.
5 more elements
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;
- and
- 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 applies a force to 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 said diaphragm member is visible through said cap.
4 more elements
Dependencies are inferred from the claim text.