Passive dosing dispenser featuring high strength initial cleaning action
US4558471A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1984 |
| Grant date | Dec 17, 1985 |
| Priority date | — |
| Expiry date | Jul 20, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03D2009/024
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A dispenser for cleaning and maintaining the cleanliness of a toilet bowl of a flush toilet is provided to co-dispense doses of two or more chemical solutions in response to the change in water level in the toilet tank reservoir during a flush cycle. The dispenser is to have an operational life based on an approximately predetermined number of flush cycles and includes a first internal reservoir containing a quantity of soluble solid-state first chemical sufficient to provide a saturated dose of first chemical cleaning solution in response to each flush cycle throughout the operational life of the dispenser to thereby maintain bowl cleanliness. A second internal reservoir is also provided which contains a quantity of soluble solid-state second chemical sufficient to provide a saturated dose of second chemical cleaning solution in response to each flush cycle only during an initial minor portion of the operational life of the dispenser thereby providing additional concentration of chemicals within the toilet bowl to facilitate loosening of established organic soil deposits on contacting toilet bowl surfaces. Both the first and second internal reservoirs include dispensing passageway…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.