Tree delimbing and felling apparatus
CA 2115280 C · Owner: Hackett, Bruce Alfred · Inventors: Hackett, Bruce Alfred; Hill, Terrance Reid
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gripping apparatus is provided that may be rotatably mounted on a vehicle, comprising an articulated boom with a gripping head rotatably and pivotally mounted thereto. The head is provided with opposable jaws comprising jaw members that apply an even pressure to an object being gripped. A saw may be pivotally mounted to the head. A drive coupling may be provided to provide a continuous rotary link between hydraulic lines on the boom with lines the head. The coupling comprises a coupling body rotatably housed within a sheath with a groove between the coupling body and the sheath. The groove permits fluid to be transmitted from the body to the sheath while they are rotated relative to each …
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 February 9, 1994 and granted April 20, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 2016.
- 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.