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Expired Canadian patentCanada

Rotor apparatus for axial field electromagnetic devices and methods of construction therefor

CA 1194915 A · Owner: Allied Corporation · Inventors: Mas, Joseph A.

CIPO record

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Abstract From the Canadian patent

In accordance with the teachings of the present invention, flow-through rotor apparatus and methods for making the same from magnetic material in strip form are provided. According to a preferred embodiment of the present invention a strip of magnetic material is wound upon a hub to form a cylindrical structure having first and second circular faces having a desired diameter and width between faces corresponding to the width of the magnetic material in strip form. A plurality of equally spaced radial slots are cut into one of the circular faces to a selected depth corresponding to a portion of the width between faces. A spider formed of conductive material and having one spoke for each slot …

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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 8, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 11, 1983
GrantedOctober 8, 1985
Term endedOctober 8, 2002
Patent numberCA 1194915 A
Classification (IPC)H02K3/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJan 11, 1983Patent grantedOct 8, 1985Term endedOct 8, 2002

Sources & verification

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