Mixing fixture for flexible-pipe spray head

A mixing-valve fixture for mixing hot and cold water which delivers a tempered water mixture especially for a rinsing table or basin comprising:

• a mixing-valve fixture housing having a mixing or outlet chamber;
• a hot and a cold water supply pipe connected to said mixing or outlet chamber in said mixing-valve fixture housing;
• a water outlet member which is a withdrawable sprayhead or sprinkler hose outlet connected to said mixing or outlet chamber;
• and
• a venting device responding to a negative pressure or suction integrated in said mixing-valve fixture housing with said mixing or outlet chamber connected to said venting device which at least comprises one closure member pressable at least by gravity into a closed position, the weight of said closure member being so chosen that said closure member is drawn into an open position under a negative pressure or suction whereby a communication between the atmosphere and said mixing or outlet chamber and/or said hot and cold water supply pipes is established for providing air.

A rinsing table fixture, comprising:

• a base mounted on a rinsing table;
• and
• a mixing valve mounted on said base, said mixing valve comprising:
• a valve housing forming a mixing chamber,
• a hot water inlet, and
• a cold water inlet,
• a valve assembly connected between said inlets and said chamber for mixing hot and cold water and controlling a flow of water through said mixing valve;
• a flexible outlet hose connected with said chamber for delivering said flow of water;
• a sprinkler head at an end of said flexible outlet hose for receiving said flow of water from said outlet hose and discharging said flow;
• and
• a vent valve in said housing communicating between the atmosphere and said chamber effective upon the development of a slight suction in said chamber to vent said chamber to the atmosphere and prevent water from being drawn back through said flexible hose, and blocking communication with the atmosphere upon operation of said mixing valve to feed water through said flexible hose to said sprinkler head, said housing being formed with a vertical bore and said vent valve including
• an annular guide received in said bore and formed with a seat,
• a valve member biased by gravity against said seat but vertically shiftable in said guide under said slight suction to lift said valve member from said seat, and
• means for sealing said member with respect to said guide and said guide with respect to said bore.