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Expired Canadian patentCanada

Silent chain and sprocket system

CA 1290171 C · Owner: Borg-Warner Automotive, Inc. · Inventors: Ledvina, Timothy James

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

A silent chain (10) for automotive vehicle or industrial drive applications wherein the chain is formed of blocks (11) of links (12) alternating with pairs of guide links (13) joined by pivot pins (14,14') wherein both teeth (23,23') of each link (12) are in driving engagement with the teeth (32,33,34 etc.) of the driving sprocket (31) with alternating inside flank (25) and outside flank (24') engagement. The pins (14) joining the guide links (13) and blocks (11) of links lie on the approximate pitch diameter (42) of the sprocket.

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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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 18, 1988
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290171 C
Classification (IPC)F16G13/04 +1 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMarch 18, 1988Patent grantedOct 8, 1991Term endedOct 8, 2008

Sources & verification

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