Excess temperature and starting safety device in pumps having permanent magnet couplings
CA 2111434 A1 · Owner: Horvath, Stefan · Inventors: Fiedler, Gerhard; Horvath, Stefan; Schmidt, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to an excess temperature and starting safety device for a magnetic centrifugal pump having a rotor, which delivers the medium and whose shaft terminates at a gap dish, where it bears permanent magnets driven by oppositely disposed permanent magnets which are connected to the shaft of the driving motor, while attached to the inner or outer surface of the gap dish is a conductor, more particularly a piece of wire of a thermocouple whose other conductor closing the conductor, circuit, is formed by the gap dish. Single Figure
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 December 14, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2015.
- 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.