Fluid flow sensor
CA 1284038 C · Owner: Pichat, Alfred · Inventors: Pichat, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A fluid flow sensor especially adapted for use in solid state electronic system.The sensor employs a heated thermistor in a first sensing network with a temperature compensation means, the two being connected in common to a sensor point. A second network includes a threshold adjusting means and a diode power supply fluctationcircuit connected to a threshold point. The two networks are connected in a bridge circuit across a power supply. The thermistor responds to temperature changes associated with air flow changes to produce a change in circuit condition at the sensor point relative to the threshold point. A utility circuit responds to these changes in circuit condition to …
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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
- Granted May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
- 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.