Improvements in variable valve timing systems
CA 2315595 A1 · Owner: Pomerleau, Daniel G. · Inventors: Pomerleau, Daniel G.; Voghell, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve lifter or valve stem that provides a fine contact point with a variable profile cam that can, enable its movement across the cam to provide a greater range of valve timing. The invention also, includes a camshaft and camshaft journal system which allows for axial movement of a camshaft based, on engine rpm and which further allows for advancing or retarding a camshaft system based on engine, rpm.
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 August 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2022.
- 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.