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Expired Canadian patentCanada

Method and machine arrangement for working in a track switch section

CA 1322293 C · Owner: Franz Plasser Bahnbaumaschinen-Industriegesellschaft M.B.H. · Inventors: Theurer, Josef

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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 method of working a main track and a laterally adjacent track in a track switch section in tandem comprises the steps of intermittently moving a track leveling lining, and tamping machine with lifting tools and vertically and laterally adjustable, vibratory tamping tools along a main track, lifting the main track under the control of a reference system with the lifting tools to a desired level at respective longer. ties connecting the tracks and tamping, ballast under the lifted ties with the tamping tools. A switch leveling and tamping machine with lifting tools is moved along the laterally adjacent track and in the same, operating stage, at least one of the …

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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 September 21, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 21, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 3, 1989
GrantedSeptember 21, 1993
Term endedSeptember 21, 2010
Patent numberCA 1322293 C
Classification (IPC)E01B35/08 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedFeb 3, 1989Patent grantedSep 21, 1993Term endedSep 21, 2010

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