Method of tree felling
CA 1046910 A · Owner: Silvey, George E. · Inventors: Silvey, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, A method for felling large trees including the conventional steps of cutting an undercut and backcut so as to leave a quantity of intact holding wood intermediate the inner extremes of the undercut and the backcut. Kerfs are cut inwardly into the tree from the undercut to remove a quantity of holding wood thereby causing calculated weakening the wood to assure a relatively clean line of severance between the stump and the log butt. Side cuts may also be made into the holding wood to diminish the chances of extracting a root, with attendant risks of injury as well as for aiming of the tree.
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 January 23, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 1996.
- 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.