Two outlet cleaning fan
CA 2121069 C · Owner: Deere & Company · Inventors: Peters, Loren William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cleaning system of a combine is provided with a cleaning shoe having a step pan, a conditioning pan and a chaffer. A cleaning fan is provided with two outlets. The first outlet has two ducts. The first duct directs a primary air blast above the step pan through grain and chaff falling from the threshing system to the step pan. The second duct directs a secondary air blast through grain and chaff falling from the step pan and the separating system onto the conditioning pan. The second outlet directs a chaffer air blast to the chaffer.
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 April 12, 1994 and granted October 7, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2016.
- 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.