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Expired Canadian patentCanada

Device for tamping railroad track adjacent the tie ends thereof

CA 1209406 A · Owner: Canron Inc. · Inventors: Von Beckmann, Helmuth

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

There is disclosed a tamping device for tamping railway track ballast adjacent and beneath the track tie ends. The device includes a track working machine, a retractable tamper frame mounted on the machine; the frame in operative position, extending at least partially in the, ballast, parallel to the center line of the track adjacent and outside the tie ends; a plurality of tamping plates mounted one behind the other longitudinally of the frame and extending inwardly thereof in the, direction of the track center, in stepped formation with a leading tamping plate extending farther from the frame inwardly towards the track center than a next adjacent trailing tamping plate. Each tamping plate …

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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 August 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
  • 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 8, 1982
GrantedAugust 12, 1986
Term endedAugust 12, 2003
Patent numberCA 1209406 A
Classification (IPC)E01B27/17

Timeline

Timeline From CIPO dates

1983198619891992199519982001Application filedFeb 8, 1982Patent grantedAug 12, 1986Term endedAug 12, 2003

Sources & verification

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