Tree pusher
CA 2488702 A1 · Owner: Smith, Wayne J. · Inventors: Smith, Wayne J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tree pusher for safely felling trees. The tree pusher controls and determines the direction in which the tree falls using a base (32), a frame , (35), a detachable head (68) which engages the tree trunk and an extendable , screw-type trailer jack (40) that is repairable/replaceable during operation and capable of bearing the weight of a large tree for urging the frame and , the head against the trunk of the tree. For use on uneven ground the tree , pusher is provided with a base extension. A chain (34) is used to connect the base of the tree pusher to the trunk of the tree to prevent movement of the , base when the jack is activated. The tree pusher can be readily moved to the job …
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 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 16, 2025.
- 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.