Multi-stage pressure regulator
US7341074B2 · kind B2 · utility
11Cited by
8References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 19, 2005 |
| Grant date | Mar 11, 2008 |
| Priority date | — |
| Expiry date | Feb 23, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87491
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A pressure regulator that has particular application for an anode input side of a fuel cell system to provide the desired large turn-down ratio. The pressure regulator includes at least two valves positioned in parallel where the first valve is smaller than the second valve. The first valve is opened and closed and the second valve is maintained closed at low flow rates. Once the flow rate is high enough, the first valve is maintained completely open, and the second valve is opened and closed to control the flow at high flow rates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.