A tedder
CA 2130752 A1 · Owner: Hansen, Jens Christian · Inventors: Hansen, Jens Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tedder has a main frame adapted for suspension from the three-point suspension of a tractor a carrier beam for a, plurality of rake rotors being pivotally suspended from said main frame in a manner such that the angle of the rotor axes with the vertical can be changed by rotation of a screw spindle from the cab of the tractor, said screw spindle being engaged with a nut on a bracket on the beam. A height adjustment mechanism is activated by a angle lever which is pivotally arranged in the beam, or a member firmly connected therewith one arm of said angle lever being so connected with the stationary end of the screw spindle that said spindle rotates when the inclination of the rotor shafts …
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 February 25, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 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.