Carbon fiber reinforced carbon composite valve for an internal combustion engine
CA 2248230 A1 · Owner: Ransone, Philip Owen · Inventors: Northam, George Burton; Ransone, Philip Owen; Rivers, Horace Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A carbon fiber reinforced carbon composite valve for internal combustion engines and the like formed of continuous carbon fibers (16) throughout the valve's stem (11) and head (13). The valve includes braided carbon fiber material (16) over axially aligned unidirectional carbon fibers (15) forming a valve stem (11). The braided and unidirectional carbon fibers are broomed out at one end (18) of the valve stem forming the shape of the valve head. The valve-shaped structure is densified and rigidized with a matrix of carbon containing discontinuous carbon fibers and the finished valve is treated to resist oxidation. Also disclosed is a carbon matrix plug containing continuous and …
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 March 13, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 13, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2019.
- 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.