Tree delimbing device
CA 2258405 C · Owner: Hamby, Thomas E. Jr. · Inventors: Hamby, Thomas E. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cutter head assembly for delimbing trees includes two pairs of opposing curved limb-stripping levers including curved cutting blades. The limb-stripping levers of each pair are pivotably movable toward and away from each other for engaging and encircling the trunk of a tree. One pair of levers is positioned and configured for engaging and removing limbs from opposite side and lower portions of a tree trunk being drawn longitudinally through the cutter head assembly. The other pair of levers is positioned and configured for engaging and removing limbs from opposite side and upper portions of a tree trunk. The limb-stripping levers include angled deflecting members attached to the cutting …
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 January 13, 1999 and granted August 20, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 13, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 13, 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.