Gravitational window shutter for hydro-pneumatic current flow harnessing system
CA 2109933 C · Owner: Gorlov, Alexander M. · Inventors: Gorlov, Alexander M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gravitational window shutter in a water gate for a system for harnessing power from current flow or tidal movement in a body of water is disclosed. The gate (102) is formed with a door (104) for closing the port (103) through which the water may flow. The door (104) has a window (120) in an upper portion thereof which is closed by a rotatable shutter (122). The shutter (122) opens before the door ( 104), allowing a flow of water through the window ( 120), which reduces the drug on the door ( 104). The door (104) is then able to open more rapidly. A gravitational closure (132) causes the shutter (122) and door (104) to close. The, gravitational closure is formed by a counterweight on …
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 14, 1992 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2014.
- 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.