Digital gas metering system using tri-stable and bi-stable solenoids
US5875817A · kind A · utility
149Cited by
5References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1996 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Aug 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87314
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A digital gas metering system includes inlet and outlet manifolds, a plurality of conduits each extending between the inlet manifold and the outlet manifold, and a solenoid-operated valve in each conduit. At least one of the valves is a tri-stable valve. Each tri-stable valve has a highest flow setting, a lowest flow setting, and an intermediate flow setting. The preferred embodiment utilizes at least two tri-stable valves, and these have respective highest flow settings which form a geometric progression in which each term is substantially triple the preceding term.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.