Freeze protection for hot water systems
US6622930B2 · kind B2 · utility
45Cited by
7References
4Claims
0Family size
Inventors
Key dates
| Filing date | Jan 24, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Mar 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1189
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In installations with water circuits such as domestic hot water or hydronic heating circuits a circulator pump is connected with a temperature sensor which energizes the pump as soon as the temperature of the water in the system falls below a predetermined temperature close to freezing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.