Vertically adjustable hitch
CA 2224841 C · Owner: Deere & Company · Inventors: Halabiya, Sabah; Dimitrijevic, Milan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A vertically adjustable hitch for an agricultural tractor includes a pair of guide rails and a retainer which moves up and down on the rails. A chain has fixed ends and a central region which engages a pair of pulleys which are rotatably mounted on the retainer. As the pulleys rotate they roll along the chain and move the retainer. A drive mechanism is coupled to rotate at least one of the pulley. A locking mechanism is releasably engageable with the chain to prevent movement of the retainer relative to the chain.
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 23, 1998 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 23, 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.