Flow indicator or flowmeter
CA 2037993 C · Owner: Kobold, Klaus · Inventors: Kobold, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a flow indicator or flowmeter with an impeller which is rotatably mounted in an essentially circular-cylindrical flow chamber of a flow housing which has an inlet channel and an outlet channel. To be able to use such an indicator and measuring device to achieve a high accuracy of measurement for a wide measuring range without any calibration the present invention provides that a nozzle plate (14) having a, nozzle hole (15) of a pre-determined cross-section can be , inserted so as to be exchangeable e.g. can be screwed, into the inlet, channel (1) and/or the outlet channel (2) and that the diameter D, (in mm) of the nozzle hole (15) can be fixed as a …
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 March 11, 1991 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2013.
- 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.