Hot wire air flow meter
CA 1291883 C · Owner: Suzuki, Tadao · Inventors: Takahashi, Minoru; Kooriyama, Tsutomu; Takada, Masumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract:, For use in a hot wire air flow meter a platinum wire, is coiled and coated with a glass material. Its ends are welded to support members to form an exothermic resistor with no bobbin therein. One such bobbin-free resistor is used as a hot wire element and another is used as a cold wire element in the meter. The heat generated in the coiled wire is almost entirely carried away through the air. In this way the transient response characteristics upon a sudden change of the amount of air flow can be improved.
Read the whole patent
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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.