Modular cutterbar for a rotary mower
CA 2041475 C · Owner: Deere & Company · Inventors: Richardson, Craig Allen; Verhulst, Michael Joseph; Walters, James C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A cutterbar includes a plurality of modules connected in end-to-end relationship with each other the modules, respectively including identical cast gear housing sections which cooperate to form a gear housing in which is located a spur gear drive train. Each module includes a removably mounted cutting unit, with the cutting units having bladecarrying discs and being arranged such that the discs are indexed 90° relative to each other and in counter rotating pairs, when an even number of units are used to form a cutterbar but being arranged such that the leftmost and adjacent blade-carrying discs rotate in the same direction when an odd number of modules are used. …
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 30, 1991 and granted May 11, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 2013.
- 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.