Water flow control device for rotary sprinkler
CA 2209502 C · Owner: Nelson, Michael C. · Inventors: Nelson, Michael C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fluid flow regulator readily attachable between a rotary sprinkler and a fluid conduit for regulating the water flow and pressure to the sprinkler to irrigate an irregular pattern such as a square The, regulator includes a body having a streamlined channel leading to a straight through flow variable orifice and being connectable with a respective fluid port member of the sprinkler and the conduit. A rotatable port piece mounted in the body has a straight through flow port, centered on the axis of rotation and communicating with the straight through flow orifice of the body. This port leads to a streamlined channel which exits into the sprinkler shaft. The port piece has a means for …
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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
- Filed July 3, 1997 and granted February 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 3, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 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.