Machine for tedding, turning and gathering of hay, straw and similar material
CA 2045590 C · Owner: Fransgaard, Thorkild Boerge · Inventors: Fransgaard, Thorkild Boerge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a machine for spreading turning and, raking together hay, straw and similar materials. The machine according to the invention has rotors (65 84) which are rotatable, around substantially vertical axles and are provided with rake arms (67) which extend radially and substantially horizontally from the rotation axles (58) of the rotors (65, 84). A number of parallel rods (68) are connected to the outermost ends of the rake arms (67) which rods constitute a rake. The rotors (65 84) have a, guide device (79, 85) so the rake arms (67) may be turned a previously determined angle around their longitudinal axis so that the rods (68) may interact with or go free of straw …
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 January 19, 1990 and granted April 12, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2012.
- 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.