Draper belt tensioning mechanism for a harvesting platform
CA 2292198 C · Owner: Hulscher, Jay T. · Inventors: Teller, Thomas G.; Watts, Bradley James; Hulscher, Jay T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A draper belt tensioning mechanism for a harvesting platform includes a linkage having a bell crank coupled to the belt idler roller to move the idler roller away from the drive roller when the bell crank is rotated to tension the draper belt. A strut coupled to the bell crank and a spring biasing the strut produces the force to tension the belt. The linkage except for the spring, is enclosed within the belt envelope. A spring gauge is positioned adjacent the spring to readily determine if the spring is compressed to the desired length. In a preferred embodiment the spring and gauge are located to be visible by a machine operator.
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 December 15, 1999 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2021.
- 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.