Constant pressure scraper system with adjustment
CA 2299072 C · Owner: Goins, Garrett Lee · Inventors: Zaun, Richard David; Goins, Garrett Lee; Hook, Richard Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A disk scraper system for an agricultural implement includes a tubular member slidably supported by the implement frame adjacent a gang assembly having a plurality of, disks. Scrapers are fixed to the member and project into scraping relationship with the disks, to remove dirt and debris from the surfaces of the disks. A hydraulic cylinder is connected, between the frame and the tubular member and connected through a pressure control valve, assembly to a source of fluid under pressure to bias the member so the scrapers are urged, into scraping relationship relative to the disks. The pressure control valve assembly may be, remotely adjustable to vary the scraper pressure on-the-go as …
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 17, 2000 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 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.