Dispensing – With fluid trap seal for inlets or outlets
Patent
1976-03-26
1977-07-19
Reeves, Robert B.
Dispensing
With fluid trap seal for inlets or outlets
222453, 4227, 4228, E03D 903
Patent
active
040364070
ABSTRACT:
An improved dosing valve for use in beverage dispensers, toilet tank additive dispensers, and the like which dispensers comprise substantially rigid reservoirs. The improved valve comprises an air-lock seal and another seal which may also be an air-lock seal. Dosing valves comprising such air-lock seals are particularly effective for obviating leakage of low viscosity, low surface tension, wetting type products such as toilet tank disinfectants comprising surfactant material. The seals are so disposed that the valve will dispense a metered dose of a liquid product from its associated reservoir each time a moveable component moves from an UP position to a DOWN position, and a dose-volume of air will be vented into the dispenser reservoir each time the moveable component is moved from its DOWN position to its UP position. The moveable member can be moved upwardly either mechanically, or by virtue of being buoyant, and it can be moved downwardly by gravity alone or by gravity supplemented by biasing means. For instance, such a valve comprising a buoyant moveable member will, if incorporated in a toilet tank additive dispenser, cause a metered dose of a liquid product to be dispensed each time the toilet tank is emptying during a toilet flushing event; and vent a dose-volume of air into the dispenser's reservoir when the toilet tank is refilled.
REFERENCES:
patent: 1454572 (1923-05-01), Walters
patent: 2587388 (1952-02-01), Ryder
patent: 2689669 (1954-09-01), Ericson
patent: 3841524 (1974-10-01), Easter
patent: 3908209 (1975-09-01), Fillmore
Gorman John V.
Handren Frederick R.
Reeves Robert B.
Slone Thomas J.
The Procter & Gamble & Company
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