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Expired Canadian patentCanada

Method and apparatus for tensioning frictionally driven, ground engaging belts

CA 1267669 C · Owner: Caterpillar Inc. · Inventors: Zborowski, David George

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

Method And Apparatus For Tensioning Frictionally Driven, Ground Engaging Belts Method and apparatus for tensioning an endless, inextensible, elastomeric ground engaging belt into frictional driven engagement with a driver wheel structure, oscillatably supporting an axle on which an idler wheel structure associated with the drive wheel structure is mounted, and accommodating recoil of the idler wheel structure. Such associated wheel structures are arranged on each lateral side of a vehiclular main frame and are entrained by the ground engaging belt. The idler wheel structures are rotatably mounted on opposite ends of the axle extending laterally relative to the main frame. The axle is …

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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 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 31, 1986
GrantedApril 10, 1990
Term endedApril 10, 2007
Patent numberCA 1267669 C
Classification (IPC)B62D55/30 +1 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedOct 31, 1986Patent grantedApril 10, 1990Term endedApril 10, 2007

Sources & verification

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