Variable rate flow divider
CA 2216332 C · Owner: Robinson, John R. · Inventors: Robinson, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid distribution system is especially useful in agricultural apparatus for delivering liquid agricultural chemicals to agricultural fields. The system includes a flow divider with a cylindrical stator with a ring of collection chambers around the bottom of the stator and a rotor having a flow passage from the centre of the top end to the bottom end above the ring of collection chambers. The flow dividers may be cascaded to provide multiple outlets. The system may include plural liquid supplies and a mixer for mixing the liquids from the plural supplies to provide a desired blend upstream of the flow divider. It is preferred that the flow of each liquid can be varied to vary the blend. …
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 September 24, 1997 and granted December 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2019.
- 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.