Auto thermostat
CA 1285541 C · Owner: Bigcharles, Don · Inventors: Bigcharles, Don
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A simple bypass valve device for carrying a winter thermostat in an automotive cooling system obviates the need for seasonal thermostat changes. The valve device includes a casing defined by identical end portions and a ring rotatably mounted between the end portions for carrying the winter thermostat. The end portions and ring contain passages which can be placed in fluid communication in spring or summer by rotating the ring so that the winter thermostat is bypassed and, in autumn or, winter, removed from fluid communication by reverse rotation of the ring so that the winter thermostat is in the flow path of the coolant, which cannot flow therearound.
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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.