Tidal power generation
CA 2420998 C · Owner: Jones, Peter · Inventors: Jones, Peter A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus is provided for obtaining energy from vertical tidal motion comprising hollow containers which rise and fall with the tide. The containers axe rotatably connected to a drive shaft such that the rising or falling motion of the containers causes rotation of the drive shaft. The containers can be empty or filled with water so that the buoyancy force can be maximized as the empty containers are raised by the tide and the weight of the filled containers maximizes the force as the containers are lowered with the receding tide. The motion of the containers are preferably caused to lag the vertical tidal motion with the extent of the lag timed to coincide with the "slack …
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 6, 2003 and granted May 1, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 6, 2025.
- 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.