Self-regulating dosing dispenser
US4738833A · kind A · utility
Inventor
Key dates
| Filing date | Jun 13, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Jun 13, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F33/503
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A toilet bowl cleaner dispenser which automatically increases or decreases its liquid volume output respectively in response to an increase or decrease in the concentration of cleaning material dissolved in a liquid solution in a dispenser reservoir, and a method of manufacture thereof. The dispenser, which may be fixed in a toilet tank at a designated position relative to the quiescent water level in the tank, includes an enclosure having an internal cavity containing a solid block of water soluble cleaning agent, the cavity being sealed except for an upper air vent and a lower water inflow and solution outflow opening. The air vent communicates with the exterior of the dispenser through an air inflow and outflow passage having an air opening at a vertical level between the upper air vent and the lower opening. The lower opening communicates with the exterior of the dispenser through a passage having a liquid opening at a vertical level between the air opening and the lower opening. With this structure, the desired volume of solution dispensed at each flush is obtained as a result of changes in the specific gravity of the solution reflecting changes in concentration of the cleanin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.