Double-helicoidal tool and lawnmower machine which incorporates said tool
CA 2638032 C · Owner: Esmoris Bertoa, Jose Antonio · Inventors: Esmoris Bertoa, Jose Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The tool consists of two rotors (1, 2) each one formed by a rotary turning , shaft (4 4') and at least one blade (5, 6) , in the form of a helix the turning shafts (4, 4') being parallel to one another and parallel to the ground or lawn and separated by a distance that is smaller than the sum of the radii of the helixes of each one of the rotors (1, 2). The blade or blades (5 6) of one of , the rotors (1, 2) have the form of a dextrogyrous helix and the blade or blades (6, 5) corresponding to the other rotor (2 1) have a , levogyrous helix. Also, one of the rotors (1 2) consists of a drive rotor (1) , and the other consists of a driven rotor (2). The derived machine incorporates at …
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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 23, 2006 and granted June 26, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 23, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.