Down pressure adjuster for seed planter
CA 2538575 C · Owner: Harnetiaux, Travis Lester · Inventors: Harnetiaux, Travis Lester; Johnson, Chad M.; Flikkema, Kevin A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A down pressure adjustment mechanism for a planter provides a self-contained spring cartridge holding a preloaded compression spring that may be moved between a limited number of mounting points to provide for convenient and significant changes in down pressure without the need for specialized tools or the like.
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 March 2, 2006 and granted May 14, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.