Tensioner for the header of a harvester
CA 2298816 C · Owner: Deere & Company · Inventors: Mccredie, Paul John; Becker, Klaus Ernst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A chain or belt tensioner is provided in a header for a harvester having a pair of, rollers, each supported on separate pivot arms and engagable with the slack and taut, strands of the chain or belt. The pivot arms are mounted about a common pivot and are, spring biased into engagement with the chain or belt by a common spring. When the drive, direction is reversed, the normally slack side of the chain becomes taut and assumes a, straight-line position between the sprockets or sheaves. The pivot arms will rotate about the, pivot and the pivot arm on the strand that has now become slack will rotate to tension the, slack strand. The biasing spring coupled to the two pivot arms biases …
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 15, 2000 and granted June 10, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 15, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2022.
- 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.