Tillage tool transport arrangement
CA 1050331 A · Owner: Blair, Calvin B. · Inventors: Blair, Calvin B.; Blair, John W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An earth tillage apparatus has an hydraulically liftable, foldable carriage with sections which extend laterally from a tongue to a wide field working position and are foldable to a narrow transport or storage position. Rigid structural arms are hingedly mounted on the tongue and have free ends extending laterally a substantial distance therefrom. In a preferred embodiment cables respectively have one end, secured to the tongue and the other end secured to the wings and extend through a pulley mounted on each of the arm free ends for the purpose of positioning the point of pull a substantial distance laterally of the tongue thereby reducing the tendency for inwardly buckling the carriage. …
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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
- Granted March 13, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 1996.
- 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.