Piston cooling oil control valve
CA 2227401 C · Owner: Schafer, Timothy Vernon · Inventors: Schafer, Timothy Vernon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An engine lubricating system has a branch passage for supplying oil to spray nozzles targeted against the engine pistons for piston cooling purposes. A tubular valve element is slidably positioned in the main oil passage for controlling the flow of oil into the branch passage in accordance with the need for piston cooling. The tubular valve element can be operated by a thermostatic power element or a calibrated spring responsive to oil pressure in the main passage.
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 January 20, 1998 and granted December 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2020.
- 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.