Valve structure of an overhead-valve engine
CA 2222952 A1 · Owner: Yamakawa, Tetsuhiro · Inventors: Uemura, Ichirou; Ueda, Yoshiteru; Tanba, Shinichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is to provide a valve structure for an overhead-valve engine that it is easy to introduce, with a cylinder head in which the combustion chamber is hemi-spherical. The inlet valve 3 and exhaust valve 2 are positioned in such a manner that they incline substantially in a "V" formation as seen in front view. Positioned on an inclined plane Ul are the longitudinal center lines 2a 4a and 1a of the inlet valve 2, the, associated push rod 4 and the rocker arm 1 which connects these, respectively. Positioned on an inclined plane U2 are the longitudinal center lines 3a 4a and 1a of the, exhaust valve 3, the associated push rod 4 and the rocker arm 1 which connects these, …
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 November 28, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 28, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 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.