Engine for outboard engine system
CA 2228577 C · Owner: Tsunoda, Masaki · Inventors: Tsunoda, Masaki; Wada, Tetsu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cylinder head is coupled to a cylinder block/cylinder head coupling surface of a cylinder block by ten bolts which are disposed to surround outer peripheries of cylinders. In order to enhance sealability of an opening of an oil passage defined radially outside the bolts as viewed from the cylinders the cylinder block and the cylinder head are further fastened to each other by two bolts disposed in the vicinity of the opening Thus, the fastening force of the cylinder block/cylinder head coupling surface can be increased to increase the degree of freedom in design of the opening of the oil passage defined in the coupling surface.
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 February 2, 1998 and granted July 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.