Mechanical seed meter
CA 2187658 C · Owner: Wisor, Donald Raymond · Inventors: Lodico, James Irwin; Wisor, Donald Raymond; Snipes, Terry Lee
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanical seed meter having a stationary housing and a rotatable bowl. The stationary housing is provided with an axial inner wall a radial outer , wall and a, flexible radial inner wall. The bowl is provided with seed receiving cells that form an, axial outer wall for trapping singled seeds in the seed trapping area. A flexible and, resilient insert together with an axially extending brush removes excess seeds from, the seed receiving cells as they pass through the seed puddle before entering the, seed trapping area. The seed slides along the radial outer wall by centrifugal force, until it enters the outlet area from which the radial outer wall becomes part of the, outlet and 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 October 10, 1996 and granted December 28, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2018.
- 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.