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...http://www.google.de/patents/US6684921?utm_source=gb-gplus-sharePatent US6684921 - Liquid supply nozzle
