Electromagnetic pump type automatic molten-metal supply apparatus
CA 1291315 C · Owner: Kubota, Shoko · Inventors: Saito, Hirozi; Kubota, Shoko; Motomura, Noriyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
When molten metal within a molten metal tank is supplied to an injection sleeve of a casting machine through a molten-metal supply pipe by the operation of an electromagnetic pump, a sensor detects changes in height of the surface of molten metal within the tank as time passes and a controller corrects the period during which the pump is driven on the basis of molten-metal surface detection signals from the sensor. The controller divides the difference in height of the surface of molten metal within the tank as between its highest level and its lowest level into a number n of regions, and drives the pump in such a controlled manner that the pump is connected to a three phase AC power source …
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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
- Granted October 29, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 29, 2008.
- 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.