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Expired Canadian patentCanada

Electromagnetic clutch

CA 1099773 A · Owner: Facet Enterprises, Inc. · Inventors: Miller, Donald L.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A single surface electromagnetic clutch or braking device is disclosed which transmits torque from an input means to an output means utilizing a plurality of spherical members located in mutually opposing conical recesses within the output member and the armature, respectively. The maximum amount of torque is translated from the input means to the output means directly through the spherical members without the need of a secondary frictional torque translating surface.

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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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 1998.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 13, 1977
GrantedApril 21, 1981
Term endedApril 21, 1998
Patent numberCA 1099773 A
Classification (IPC)H02K49/00 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedMay 13, 1977Patent grantedApril 21, 1981Term endedApril 21, 1998

Sources & verification

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