Excavation system and method
CA 2414334 C · Owner: Enbridge Technology Inc. · Inventors: Mcgivery, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method of cutting a core out of a finished surface for keyhole excavation provides a truck with a turret to which a support arm supporting the cutter assembly is mounted and a stabilizing member remote from the turret which allows the turret to be rotated about its complete arc of motion while stabilizing the support arm at any desired position about the truck. In a first embodiment the invention comprises an upstanding support rim affixed to or integrated into the bed of the truck. In a further embodiment the invention comprises a support member affixed to the horizontal arm and supported by the truck bed. This makes the keyhole excavation procedure safer and more precise and …
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 December 13, 2002 and granted April 12, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2024.
- 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.