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Expired Canadian patentCanada

Apparatus for counteracting torsional stresses

CA 1287239 C · Owner: Luk Lamellen Und Kupplungsbau Beteiligungs Kg · Inventors: Reik, Wolfgang; Elison, Hans-Dieter

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 vibration damping apparatus which is installed in the power train between the crankshaft of an internal combustion engine and the input shaft of a change-speed transmission in a motor vehicle has two coaxial flywheels which are rotatable relative to each other against the opposition of one or more dampers. The damper or dampers are installed in a fluid-containing chamber which is provided in part in one of the flywheels.

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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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 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.
FiledSeptember 8, 1986
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287239 C
Classification (IPC)F16F15/12 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedSep 8, 1986Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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