The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 1990
Filed:
Oct. 11, 1989
Stephen H Iding, Cincinnati, OH (US);
Robert S Dirksing, Cincinnati, OH (US);
The Procter & Gamble Company, Cincinnati, OH (US);
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/discharge 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.