Valve device of engine
CA 2374805 A1 · Owner: Ichikawa, Masaharu · Inventors: Ichikawa, Masaharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A valve device of an engine, wherein an opening part (7) smaller in area than the end surface of a piston (5) is provided in the end surface of a cylinder (3) so as to form a valve seat (8), and a valve disc (9) in contact with the valve seat (8) is disposed on the outerside of the valve seat (8) so that the cylinder (3) can be moved away from and toward the valve disc (9) and in a , compression stroke when the piston (5) rises the valve seat (8) is in press-, contact with the fixed valve disc (9) because an upward force is applied to the upper end surface of the cylinder (3) and the cylinder (3) is urged toward the valve disc, whereby an engine high in emission efficiency can be …
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 May 24, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 24, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 24, 2021.
- 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.