Expansion tank with valve
US7412987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Feb 26, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87555
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An expansion tank to be connected to a pipe system filled or with a liquid is disclosed. The expansion tank includes at least one connection opening for a liquid pipe. The tank has a main valve to close off the connection opening at a defined difference in pressure between the interior of the tank and the connection opening and/or at a defined liquid level in the tank. The tank also has an additional valve for closing off a channel extending through the closure member of the main valve from the interior of the tank to the connection opening. The additional valve is closed during normal operation of the expansion tank and is open if the difference in pressure between the interior of the tank and the connection opening is higher than the original pressure in the expansion tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.