Digital gas metering system using tri-stable and bi-stable solenoids
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United States of America Patent
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Mar 2, 1999
Grant Date -
N/A
app pub date -
Aug 19, 1996
filing date -
Aug 17, 1995
priority date (Note) -
Expired
status (Latency Note)
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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.
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