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Expired Canadian patentCanada

Rack assembly for forming splines in thin-wall member

CA 1297326 C · Owner: Anderson, Carl E. · Inventors: Anderson, Carl E.; Killop, James T.

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An apparatus (10) and die assembly (26,30) for forming a splined power transmission member from a thin-walled blank. The apparatus (10) comprises a pair of die assemblies (26,30) each including a supporting frame (28) first (42), and second (44) die bodies independently mounted on the supporting frame (28) in end-to-end coaxial relationship with each other, with rough (46) and finish (48) spline-forming surfaces formed on the first (42) and second (44) die bodies, respectively. The pair of die assemblies (26,30) are supported with the spline-forming surfaces of the respective die bodies (42,44) in spaced opposed, parallel relationship to each other. A power drive mechanism sequentially …

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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 March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 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.
FiledApril 30, 1987
GrantedMarch 17, 1992
Term endedMarch 17, 2009
Patent numberCA 1297326 C
Classification (IPC)B21H5/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedApril 30, 1987Patent grantedMarch 17, 1992Term endedMarch 17, 2009

Sources & verification

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