Propulsion system for ships, in particular a propulsion system that includes a rudder propeller
CA 2116610 A1 · Owner: Schottel-Werft Josef Becker Gmbh & Co. Kg · Inventors: Heer, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ship's propulsion system has a propulsion propeller arranged beneath the ship's bottom that is preferably essentially flat or flat in the area of the propulsion system, and which can be retracted above the plane of the ship's bottom into a shaft. When the propeller is retracted into it, the shaft can be closed off within the plane of the ship's bottom by means of a plate, in the manner of a cover. It is preferred that the shaft can be closed off by means of the plate so as to be water tight, and that the water enclosed in the closed shaft can be pumped out when the, shaft that has been pumped empty is accessible through a manhole in the upper shaft cover so as to permit maintenance or …
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 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2016.
- 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.