Excess flow shutoff valve
US6363963B1 · kind B1 · utility
5Cited by
5References
4Claims
0Family size
Inventor
Key dates
| Filing date | Aug 25, 2000 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Aug 25, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7871
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An excess flow control valve which automatically shuts off when an excessive flow of liquid or gaseous material is detected. The valve uses a flow sensitive piston which is drawn up to cover the valve outlet when the flow exceeds a specified rate. When the piston is seated against the valve outlet, flow ceases, or is reduced dramatically, and the piston is held in place by the pressure of the supply. Additionally, ports are provided to activate a pressure differential device which can be used for remote monitoring and/or valve position, i.e., a red flag or switch, if desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.