Flow-through tankless water heater with flow switch and heater control system
CA 2240992 C · Owner: White, James A. Jr. · Inventors: Gillaspie, David D.; White, James A. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A very compact tankless heater delivers heat in proportion to demand. A flow responsive valve energizing an electrical control system is purely flow responsive, even to minute flow and, consumes no power when dormant. An uncomplicated electronic control system is connected to power by the flow switch and is, substantially deenergized when dormant. Most electronic components of the control system are mounted on the flat front wall of the pressure vessel. Thus, overall dimensions are minimized, cool water serves as a heat sink and heat generated, by electronic controls is captured for heating purposes. In particular, triacs controlling the heating elements are cooled thus prolonging their …
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
- Filed December 22, 1995 and granted November 7, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2017.
- 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.