Humidifier and means for removing calcium carbonate from water
US5916490A · kind A · utility
33Cited by
34References
24Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Jul 21, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/48
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A humidifier is provided of the type which has a water tank or reservoir for holding tap water. Common tap water frequently is "hard" due to dissolved minerals which result in the humidifier emitting a fine dust when such water is used. By affixing electroplated electrodes to the interior of the tank minerals such as calcium carbonate can precipitate on the surface of the cathodes. Temporarily reversing the polarity of the electrodes will cause the calcium carbonate to be dislodged from the electrodes and fall to the bottom of the reservoir where it can be removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.