E - Fixed Constructions – 03 – D
Patent
E - Fixed Constructions
03
D
4/17.7
E03D 9/02 (2006.01) E03D 9/03 (2006.01)
Patent
CA 1155604
ABSTRACT OF THE DISCLOSURE A passive dosing dispenser for issuing. for example, a volume of a toilet tank additive solution into a toilet tank as the water is draining therefrom while the toilet is flushing. A preferred dispenser comprises a product chamber for containing a quantity of a solid type product which can be dissolved in water to form a toilet tank additive product solution, a solution reservoir for containing a quantity of said solution in fluid communication with said product chamber, an inlet/discharge conduit having its lowermost end in fluid communication with said solution reservoir and its uppermost end in fluid communication with a syphon tube, a first air trap disposed adjacent said inlet/discharge conduit for trap- ping an air bubble that is used for isolating said product solution from the toilet tank water in the syphon tube during quiescent periods, a second air trap disposed adjacent the syphon tube for retaining the air bubble while the water is draining from the toilet tank during flushing, a discharge reservoir disposed at the outlet end of the syphon tube to retard the discharge of the toilet tank additive product solution so that the discharge requires a predetermined period of time, and an air vent in fluid communication with the solution reservoir and the product chamber. In operation, while the water in the toilet tank is receding from about the dispenser, a quantity of the product solution is syphoned from the solution reservoir through the inlet/discharge conduit and is dispensed through the syphon tube and the discharge reservoir and out the inlet/discharge port. In a preferred embodiment. the dispenser provides a pair of air-locks when it is completely immersed in a full toilet tank. The air-locks isolate the product and product solution from toilet tank water which surrounds the dispenser during quiescent periods.
389718
Brunsman Michael A.
Callicott Robert H.
Cornelisse William
Kirby Eades Gale Baker
The Procter & Gamble Company
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