Cultivator
CA 2019316 A1 · Owner: Brandt Industries Ltd. · Inventors: Karchewski, John; Semple, Gavin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A problem common to existing cultivators of the toothed wheel type is that of making repairs. If a tooth or tine-is damaged or broken, substantial disassembly of the cultivator may be necessary to effect repairs. This problem is overcome by the use of a plurality of toothed wheels arranged side-by-side on shafts to defined sections which in, turn are mounted on a boom for towing over the ground. Each wheel includes a pair of parallel, spaced apart circular, plates with partitions extending therebetween to define a central pentagonal shaft receiving passage and five compartments around the central passage for receiving rubber blocks. The rubber blocks carry generally V-shaped teeth which …
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 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2012.
- 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.