Modulating fluid control device
CA 2274057 A1 · Owner: Mcintosh, Douglas S. · Inventors: Mcintosh, Douglas S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a modulating fluid control device for a fluidbased heating and cooling system for a measured environment. The control device comprises a body (6), a fluid entry port (8) and a fluid exit port (10) and a valve (12) with actuator (21) located between the ports. In the case of three-way valves a bypass port is also provided thus becoming a mixing or diverting valve. The valve (12) is responsive to input from a sensor and controller to restrict or permit the flow of fluid through the valve (12) dependent upon conditions in the measured environment. The improvement is characterized in that the control device is provided with: (a) a valve controller (20) …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 4, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.