05875817 is referenced by 142 patents and cites 5 patents.

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.

Title
Digital gas metering system using tri-stable and bi-stable solenoids
Application Number
8/699498
Publication Number
5875817
Application Date
August 19, 1996
Publication Date
March 2, 1999
Inventor
Stephen Carter
Mississauga
CA
Agent
Shoemaker and Mattare
Assignee
Ortech Corporation
CA
IPC
F16K 11/24
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