Double-drum wood chipper apparatus
CA 1284760 C · Owner: Brown, Kenton J. · Inventors: Brown, Kenton J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A double-drum wood chipper for obtaining wood chips of uniform thickness from logs. Each one of a pair of oppositely rotating, hollow, open ended drums is provided with cutting knives. An aperture through the drum walls is located near each knife for reception of the wood chips. Two knife patterns on the drums are disclosed. The parallelcutting edge of each knife makes an angle of about 150° with the cutting edge of each of two laterally positioned integral cross cutting knives.
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 June 11, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 11, 2008.
- 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.