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Expired Canadian patentCanada

Process and device for controlling the driving torque transmitted by a tractor to a hydraulically powered trailer

CA 1314488 C · Owner: Noerens, Wily J. · Inventors: Noerens, Wily J.

CIPO record

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

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Abstract From the Canadian patent

Wily Joseph Noerens, INVENTOR Wily Joseph NOERENS, ABSTRACT, A torque controlling device associated with the tractor and a trailer of a tractor-trailer vehicle drives the tractor wheels and at the same time drives a hydraulic converter on the tractor which communicates by appropriate conduits to a hydraulic motor on the trailer. The hydraulic motor on the trailer drives the wheels on the trailer. Both the apparatus and the method of controlling the torque controlling device to wheel sets of the tractor and of the trailer are disclosed.

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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 March 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 16, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 12, 1989
GrantedMarch 16, 1993
Term endedMarch 16, 2010
Patent numberCA 1314488 C
Classification (IPC)B62D59/02

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedApril 12, 1989Patent grantedMarch 16, 1993Term endedMarch 16, 2010

Sources & verification

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