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Expired Canadian patentCanada

Timing of multiple gear train differential

CA 1311142 C · Owner: Dk-Gleason, Inc. · Inventors: Dye, James S.

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

Abstract, A differential gear assembly of the type used in automotive and truck axles having multiple gear trains for interconnecting axle ends is provided with gearing components having a particular relationship between tooth numbers for simplifying assembly requirements of the differential. For example, each gear train includes a pair of combination gears (40, 50) formed with center worm wheel portions (42, 52) and first (44, 54) and second (46 56), spur portions at either end. The tooth numbers of the spur portions (44, 54 and 46, 56) are made an integer multiple of the tooth numbers of the worm wheel portions (42 52) of, each combination gear (40, 50). This enables the respective gear …

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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 December 8, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 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.
FiledNovember 14, 1988
GrantedDecember 8, 1992
Term endedDecember 8, 2009
Patent numberCA 1311142 C
Classification (IPC)F16H48/06 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedNov 14, 1988Patent grantedDec 8, 1992Term endedDec 8, 2009

Sources & verification

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