A mechanical seed meter
CA 2215547 C · Owner: Deere & Company · Inventors: Lodico, James Irwin; Snipes, Terry Lee; Wisor, Donald Raymond
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 a first axial wall an outer radial wall and a, flexible inner radial wall. The bowl is provided with seed receiving cells that form a second axial wall for trapping singled seeds in the seed trapping area. A flexible and resilient flap maintains the seed in the seed receiving cells. 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 outer radial wall becomes part of …
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 1, 1997 and granted January 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 1, 2019.
- 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.