Chaff spreader
CA 2107948 A1 · Owner: Poirier, Gerard H. · Inventors: Poirier, Gerard H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chaff spreader is mounted on the rear of a combine by a single beam projecting rearwardly from the rear axle of the combine. At the outer end of the beam is an hydraulic motor with its output shaft vertical. Mounted on the shaft is a spreader head including a flexible apron and a set of flexible flails that rotate below the chaff discharge. The beam supporting the chaff spreader is hinged so that the outer section of the beam and the spreader head itself may be swung to one side providing access to the rear of the, combine for cleaning purposes. When the outer section is swung to the side a hitch plate, on the inner section is exposed and can be used for towing a trailer for example a …
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 7, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 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.