Computer controlled intake and exhaust valve
CA 2234784 C · Owner: Sebastian, Duane J. · Inventors: Sebastian, Duane J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A computer controlled intake and exhaust valve for internal combustion engines having a microprocessor controlled, hydraulically operated, valve actuator with manually adjustable variable performance settings for improving fuel efficiency and reducing emissions while also providing a high performance power stroke and lengthening the life of the valve seat by damping the impact of valve reseating. The computer controlled intake and exhaust valve includes a) a semi-automatic engine braking feature whereby the compression of exhaust gases within the chamber of a cylinder prior to venting is used to aid in reducing the speed of the vehicle, thus prolonging the life of the brakes and the safety …
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 April 15, 1998 and granted March 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.