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Expired Canadian patentCanada

Chain guide

CA 1298722 C · Owner: Apv Douglas Machine Corporation · Inventors: Pazdernik, Irvan L.

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

TITLE, Chain Guide, ABSTRACT OF THE DISCLOSURE A chain guide (10) secured to an attachment tab (22 of an attachment link (20) of a roller chain (12) is disclosed for stabilizing the roller chain (12) on a chain rail (14). Chain guide (10) is generally symetrical about longitudinal and lateral axes and includes a central, right parallelepiped portion (26) integrally formed intermediate end portions (34) having a cross section of an isosceles triangle. The surfaces (36) of end portions (34) pilot chain guide (10) onto the chain rail (14). The support surfaces (28) of portion (26) slideably abut the face (16) of the chain rail (14). A socket (46) is provided intermediate and parallel to 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 April 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 14, 2009.
  • 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 19, 1988
GrantedApril 14, 1992
Term endedApril 14, 2009
Patent numberCA 1298722 C
Classification (IPC)F16H7/18 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedOct 19, 1988Patent grantedApril 14, 1992Term endedApril 14, 2009

Sources & verification

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