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Expired Canadian patentCanada

Device for tightening an endless element trained over driving members

CA 1069346 A · Owner: Kubota, · Inventors: Itatani, Hiroshi; Toyokuni, Kazuo; Kuroiwa, Ryozo

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 drive transmission and tightening device for an endless drive element of the drive transmission with said endless driving element lying substantially in one plane and being trained over a primary rotary driving member and at least one rotary driven member which with the endless driving element are disposed in a drive transmission housing including side walls on either side of the plane in which the endless driving element lies and said housing having a width slightly greater than the width of said endless driving element; said tightening device comprising: a curved or bow-shaped tightener element disposed in the housing adjacent to and extending in the general direction of one run of the …

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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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJanuary 8, 1980
Term endedJanuary 8, 1997
Patent numberCA 1069346 A
Classification (IPC)F16H7/14 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 8, 1980Term endedJan 8, 1997

Sources & verification

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