Manure spreader
CA 2124562 C · Owner: Gehl Company · Inventors: Kuhn, Fred G.; Groeneveld, Wilbur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A manure spreader (10) includes a generally V-shaped hollow body or hopper (12), disposed on a movable frame (24) and having a side discharge rotary expeller (34) for spreading the manure over a wide area as the spreader (10) is displaced. A pair of hydraulic cylinders (40, 42) move the rotating auger (36) from a lower portion of the V-shaped body (12) upward along an inclined body wall (14), maintaining an essentially fixed close spacing between the conveyor auger (36) and the expeller (34) and also maintaining a working relationship between the conveyor auger (36) and the body wall (14). A suitable drive mechanism drives the auger conveyor (36) and expeller (34) combination with a …
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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 September 17, 1993 and granted May 13, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2015.
- 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.