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Expired Canadian patentCanada

Idler pulley and method of mounting a precision bearing

CA 1237295 A · Owner: Dye, Donald D. · Inventors: Dye, Donald D.

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

A pulley device having a bearing of precise dimensional tolerance (precision ground) supported in a sheave of less precise tolerance including a ball or roller bearing with an inner and an outer race, and an elastic ring supported by the outer race. The pulley device additionally includes a two piece sheave enclosing the outer race and the ring effective to place the ring under a compressive load whereby the main body of radial load on the pulley is transmitted to the bearing through the ring, resulting in the ring being compressed around the outer surface of the bearing assuring a firm re-, liable grip on the bearing, and while the sheaves are in contact with the end portion of the outer …

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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 May 31, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 31, 2005.
  • 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 9, 1985
GrantedMay 31, 1988
Term endedMay 31, 2005
Patent numberCA 1237295 A
Classification (IPC)F16H55/36

Sources & verification

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