Quick set variable scraper pressure coulter assembly
CA 2298395 A1 · Owner: Bourgault Industries Ltd. · Inventors: Butterfield, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an agricultural implement and more particularly a coulter assembly for cutting a trench or furrow in the land for depositing seed and fertilizer therein. The coulter assembly may be used in conjunction with packers or other coulters, which cover the furrow with soil. The invention involves a scraper which is attached to a torque arm. A torsion spring is attached to the torque arm to generate the scraping pressure against the coulter disk required to rid the disk of soil and debris. In order to make the scraper quickly adjustable for variable conditions, a slotted receiver is attached to a strut and is appropriately positioned to securely hold the end of the torsion spring at a …
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 14, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2022.
- 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.