Device for mixing and dispensing fluids

A device for mixing and dispensing fluids, comprising:

• a. a housing;
• b. a mixing chamber in said housing, said mixing chamber comprising
• (1) a first inlet for introducing a first fluid into said mixing chamber,
• (2) a second inlet for introducing a second fluid into said mixing chamber, and
• (3) an outlet through which fluid may exit said mixing chamber;
• and
• c. a valving rod received within said mixing chamber and movable between
• (1) an open position, in which said first and second inlets are in fluid communication with said mixing chamber such that the first and second fluids may enter said mixing chamber, form a mixture therein, and exit said mixing chamber via said outlet,
• (2) a cleaning position, in which said valving rod substantially seals closed said first inlet to substantially prevent the first fluid from entering said mixing chamber, but does not seal closed and flow through said mixing chamber, whereby said second fluid acts as a cleaning agent for said mixing chamber, and
• (3) a closed position, in which said valving rod substantially seals closed said first and second inlets to substantially prevent the first and second fluids from entering said mixing chamber.