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Expired Canadian patentCanada

Method and apparatus for the shock pressure shaping

CA 1056224 A · Owner: Transform Verstarkungsmaschinen Aktiengesellschaft · Inventors: Dits, Herbert

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

The present invention provides a method for the shock pressure shaping of blanks to form finished products by using a shock pressure shaping tool, wherein the upper portion of said tool is placed upon the blank by hydraulic means under a tool closing pressure, upon having travelled through a tool closing stroke or path, to thereby hold down the blank until the shock pressure shaping process is initiated, characterized in that the level of the tool closing pressure is adapted to be controlled and that during the subsequent shock pressure shaping operation the shaping or deforming process is influenced through a variable degree of elasticity of the shock pressure force by means of a …

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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 June 12, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJune 12, 1979
Term endedJune 12, 1996
Patent numberCA 1056224 A
Classification (IPC)B21D26/00 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedJune 12, 1979Term endedJune 12, 1996

Sources & verification

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