Aerial tree harvesting apparatus
CA 2273818 C · Owner: Chalifoux, Robert · Inventors: Chalifoux, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aerial tree harvesting apparatus includes a first body and a second body having co-axial bores defining a tree receiving opening. The first body is suspended from a hovering aerial craft and has arms that hold a tree positioned within the tree receiving opening. The second body is suspended by cables from the first body. Delimbing members are mounted on the second body about the tree receiving opening. The delimbing members sever limbs from the tree when the second body is lowered relative to the first body. A severing saw is movable from a rest position adjacent the tree receiving opening transversely across the tree receiving opening thereby severing the trunk of the tree positioned in …
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 10, 1999 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2021.
- 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.