Multi-tine cultivator frame suspension and adjustment mechanism
CA 2049247 A1 · Owner: Hundeby, David R. · Inventors: Hundeby, David R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention disclosed relates to a mechanism for adjusting the level, tine working depth, and tine working angle of a framework supporting a multiplicity of cultivator tines. The framework is cantilevered from and behind a boom drawn on wheels and includes a pair of rock shafts that are: 1) rotated together to adjust the working depth of the tines, 2) rotated relative to one another to adjust the level of the working depth of the tines; the working angle of the tine is adjusted by mechanical rotation of frame tubes forming part of the framework and on which the tines are directly mounted. The invention disclosed also includes a novel hydraulic circuit for powered rotation of the …
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 August 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2013.
- 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.