Fire hydrant with second valve

Details Fire hydrant with second valve Fire hydrant with second valve

E - Fixed Constructions

03

B

E03B 9/16 (2006.01)

Patent

CA 2508770

Fire hydrants which feature additional structure for reducing the potential that those with ill intent can foul municipal water supplies by introducing toxins or other materials into fire hydrants. Various embodiments include valves which close off portions of the hydrant otherwise available for receipt of toxic or other materials when the fire hydrant nozzle cap is unscrewed and open. Such valves preferably open, manually or automatically, when water is flowing from the water supply through the nozzle, a condition which renders it difficult at best to introduce toxins through the hydrant into a water supply, but close off portions of the barrel when the nozzle is open and water is not flowing through the nozzle.

L'invention concerne des bouches d'incendie comprenant une structure supplémentaire permettant de réduire la pollution éventuelle de systèmes municipaux d'approvisionnement en eau par des personnes mal intentionnées par introduction de toxines et d'autres matériaux dans lesdites bouches d'incendie. Dans différents modes de réalisation, des vannes ferment des parties de prise d'eau autrement disponibles pour recevoir des matériaux toxiques ou autres lorsque le bouchon de buse de la bouche d'eau est dévissé et ouvert. Ces vannes sont ouvertes, de préférence, manuellement ou automatiquement, lorsque l'eau s'écoule de l'alimentation d'eau à travers la buse, condition qui rend difficile au mieux l'introduction de toxines à travers la bouche dans l'eau d'alimentation, mais ferment des parties de la colonne lorsque la buse est ouverte et que l'eau ne s'écoule pas à travers ladite buse.

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