Underwater cable burial machine having tripable plows
CA 2196836 C · Owner: Garren, Donald Lee · Inventors: Garren, Donald Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cable burying machine having three plow blades which are mounted on a rotating disk. The disk is restrained from movement in normal operation but if the, active plow blade encounters an obstacle which imposes more than a preset force on the blade, the disk will automatically rotate preventing damage to the blade, and bringing the next blade into position. A remotely operable tripping mechanism can be used to reduce the amount of resistance to rotation which was preset, thereby allowing an operator on a surface vessel to command a plow rotation to remove debris from the active plow blade.
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 5, 1997 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2019.
- 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.