Improvements in cylinder-type mowers
CA 2276210 A1 · Owner: Brown, David John · Inventors: Brown, David John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cut-adjusting apparatus for a mower comprising a rotatably mounted cutting cylinder (10) and a stationary blade (18) in grass-cutting relationship therewith, the apparatus comprising means for effecting relative approaching movement of the cylinder and the stationary blade towards each other until they contact each other with a predetermined force and means for effecting , relative movement of the cylinder and blade away from each other to separate them by a predetermined distance, thereby defining the cutting relationship of the cylinder and the blade. The approaching movement is effected hydraulically, and a volume of fluid is trapped when the in-contact datum is established. …
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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 January 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 21, 2020.
- 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.