Ship's stern bulb
CA 1237607 A · Owner: Van Diepen, Peter J. · Inventors: Van Diepen, Peter J.; Allan, Robert G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the propulsion of self-propelled vessels, and in particular to the form of a ship's stern. The invention describes a new and distinctive form of bulbous-shaped stern form which unlike, other stern bulbs developed to date does not fair into the hull, instead intersecting it to create a sharp discontinuity between surfaces. This discontinuity creates a turbulent zone along the said intersection allowing the, wake to reorganize and to follow in a desired pattern the bulb's shape in the proximity of the propeller. Thus a more uniform wake field is formed within the propeller disc, consequently improving propeller efficiency and reducing propeller induced vibration. …
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
- Granted June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.