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Expired Canadian patentCanada

Multi-axis ecm machine useful for machining airfoils of rotors

CA 1295968 C · Owner: Hinman, Edmund R. · Inventors: Hinman, Edmund R.

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

Abstract of the Disclosure, A six axis ECM machine is provided for electrochemically machining the airfoil blades of an integrally bladed rotor of a gas turbine engine. The cathodes of the machine each move along two different sets of axes, a right X-axis and Y-axis and left X-axis and Y-axis, relative to a workpart machining position in the electrolyte chamber while the rotor is moved vertically along a Z-axis. The rotor is indexable about a sixth horizontal axis to present individual airfoil blades for machining at the workpart machining position. The rotor is fixed on the Z-axis slide with its lateral center plane at an angle relative to the cathodes at the workpart machining position …

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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 February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 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 21, 1986
GrantedFebruary 18, 1992
Term endedFebruary 18, 2009
Patent numberCA 1295968 C
Classification (IPC)B23H9/10 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedOct 21, 1986Patent grantedFeb 18, 1992Term endedFeb 18, 2009

Sources & verification

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