Tree pruning machine
CA 1267590 C · Owner: Kaisei Kogyo Corporation · Inventors: Tanitomi, Fuminao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tree pruning machine which has a body for vertically elevating on a standing tree through a wheel driven by an engine, a rotary device for turning on the periphery of the body, a cutting unit provided in the rotary device and having a detector for detecting the cutting resistance effected from the cutting branch, and a rotating speed reduction unit of the rotary device, wherein the rotating speed reduction unit is controlled by the detector of the cutting resistance. If a branch having a large current resistance such as a thick or hard branch makes contact with the cutting unit, the detector detects the contact of the cutting unit with the branch having large cutting resistance, the …
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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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.