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Expired Canadian patentCanada

Electromagnetic induction heating device with two opposed chambered ends

CA 1249037 A · Owner: Celes · Inventors: Nuns, Jacques; Abraham, Joseph

CIPO record

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Abstract From the Canadian patent

The invention relates to an electromagnetic induction apparatus for heating metal elements. The device comprises at least one flat loop magnetic circuit open at its two facing ends, with an inductor wound onto said magnetic circuit. The element to be heated is placed in the air gap located between the two ends of the loop. The inductor comprises two windings wound onto the magnetic circuit, respectively in the vicinity of the two ends of the loop. These windings are respectively supplied by in phase alternating currents. Each end of the flap loop becomes thinner in chamfer form towards the air gap. Application to induction heat treatment procedures.

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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 January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 27, 1985
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1249037 A
Classification (IPC)H05B6/02 +1 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 27, 1985Patent grantedJan 17, 1989Term endedJan 17, 2006

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.