Method of isolating a product in a passive dosing dispenser by t

Baths – closets – sinks – and spittoons – Disinfection – Dispensing to air from closet

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E03D 903

Patent

active

049397958

ABSTRACT:
The present invention is a passive dosing dispenser for containing a solution which is to be isolated from a body of liquid when the dispenser is at least partially immersed therein. The dispenser is adapted to have a dose of the solution issue from the dispenser in response to the level of the body of liquid being lowered from a first elevation to a second elevation, and to have liquid taken into the dispenser as the level of the body of liquid rises from the second elevation to the first elevation. The dispenser has an internal reservoir which contains the solution, and an inlet/dishcarge passageway which, in use, provides fluid communication between the reservoir and the body of liquid. The inlet/discharge passageway has an intermediate, inverted, generally u-shaped section in which a gas-lock is formed to isolate the solution from the body of liquid. The dispenser contains a gas generating means for providing gas bubbles in the dispenser and passive means for directing at least a portion of the gas bubbles to the inverted, generally u-shaped section of the inlet/discharge passageway to establish a gas-lock thereacross.

REFERENCES:
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patent: 4171546 (1979-10-01), Dirksing
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patent: 4281421 (1981-08-01), Nyquist et al.
patent: 4438534 (1984-03-01), Keyes et al.
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patent: 4480341 (1984-11-01), Richards
patent: 4485500 (1984-12-01), Melville, Jr.
patent: 4530118 (1985-07-01), Richards
Sani-Flush.RTM. Tank II.TM., Circa 9/82, Boyle-Midway Inc.
Vanish.RTM. Bowl Brite.RTM., Circa 11/83, The Drackett Co.

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