A cutting tool for digging trenches, and enabling the cutter head to be changed quickly
CA 2470810 C · Owner: Compagnie Du Sol · Inventors: Mathieu, Fabrice; Chagnot, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a cutting tool for digging vertical trenches the tool comprisincl: .cndot. a.jib (B) having a cutter structure (34; C) suspended therefrom via a cable; .cndot. a plurality of cutter members (18) disposed on at least one cylindrical surface; a motor assembly (12); and power supply means (46) for powering said motor assembly (12). The tool is characterized in that it further comprises: .cndot. releasable retention means (22; 44) for securing at least a portion of the motor assembly (12) having the cutter members (18) mounted thereto to the bottom end of the structure (34); .cndot. relative positioning means between the structure (34) and the motor assembly (12); 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 June 11, 2004 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2026.
- 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.