E - Fixed Constructions – 03 – D
Patent
E - Fixed Constructions
03
D
4/17.7
E03D 9/03 (2006.01)
Patent
CA 1112001
PASSIVE DOSIING DISPENSER EMPLOYING TRAPPED AIR BUBBLE TO PROVIDE AIR-LOCK Robert S. Dirksing ABSTRACT OF THE DISCLOSURE A passive dosing dispenser for issuing, for example, a predetermined volume of a toilet tank additive solution into a toilet tank as the water is draining there- from 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 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 reservoir and its uppermost end in fluid communication with a syphon tube, an air trap disposed adjacent said inlet/discharge conduit for isolating said product solution from the toilet tank water in said syphon tube during quiescent periods, and an air vent in fluid communication with said reservoir and product chamber. In operation, while the water in the toilet tank is receding from about the dispenser, a predetermined quantity of said product solution is syphoned from said reservoir through the inlet/discharge conduit and is dispensed through the syphon tube. In a particularly preferred embodiment, the dispenser provides a pair of air-locks when completely immersed in a full toilet tank which air- locks isolate the product and product solution from toilet tank water which surrounds the dispenser during quiescent periods.
325630
Kirby Eades Gale Baker
The Procter & Gamble Company
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