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Expired Canadian patentCanada

Means for squaring tie bars for die casting machines

CA 1281169 C · Owner: Prince Machine Corporation · Inventors: Hegel, Robert W.; Vanappledorn, William

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 system and machine for squaring tie bars for die casting machines in which a detector means is provided for each of the tie bar nuts for separately and individually detecting the relative positions of the tie bar nuts of each of the tie rods whereby when the machine is originally squared by adjusting the adjustable means the original, squared positions of the nuts are detected and after operation of the machine it can be resquared by adjusting said adjustable means to adjust said tie bar nuts back to their original squared positions. This adjustment is automatically accomplished through a logic circuit which controls the adjustment of the tie bar nuts.

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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 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 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.
FiledMay 27, 1987
GrantedMarch 12, 1991
Term endedMarch 12, 2008
Patent numberCA 1281169 C
Classification (IPC)B22D17/20 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMay 27, 1987Patent grantedMarch 12, 1991Term endedMarch 12, 2008

Sources & verification

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