Method and apparatus for raising or lowering the raking wheels of a foldable hay rake
CA 2477059 C · Owner: Rowse, Rodney D. · Inventors: Rowse, Dan D.; Rowse, Rodney D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A foldable hay rake has two rake arms comprised of two or more arm members with rake wheels thereon. The hay rake arms are pivotally secured together to a pivot assembly to pivot in a vertical plane. The pivot assembly is pivotally secured for pivoting in a horizontal plane to a vertical post having positioning wheels at a lower end. An upper end is pivotally secured to outer ends of wing arms comprised of parallelogram members which are pivotally secured to a central base frame which has a power cylinder to pivot the wing arms in a horizontal plane. A lift tube is mounted to the rake arm and attached to the raking wheels. A hydraulic cylinder is attached to the rake arm and the forward end …
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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 August 11, 2004 and granted February 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 11, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 2026.
- 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.