Counterrotation mulching mower
CA 2188491 C · Owner: Bush Hog, L.L.C. · Inventors: Britton, George E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mulching mower is provided for mowing and mulching turf vegetation in order to reduce the size of the cut vegetation and more evenly distribute the vegetation once thus cut. Counterrotating coaxial blade, and mulching tool assemblies are provided. Each blade assembly is driven by a central shaft rotatably mounted through a drive barrel which drives the mulching tool. A belt drive assembly translates rotation at a driving sheave into rotation in two different directions at spindles positioned along the mower, each spindle including a blade and a mulching tool.
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 October 22, 1996 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 22, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2018.
- 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.