Method for replacing old sleepers of a railway track by new sleepers
CA 2570586 C · Owner: Brunninger, Manfred · Inventors: Theurer, Josef; Brunninger, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The aim of the invention is to replace old ties (6) of a railway track (8) by new ties (11). This aim can be achieved by spreading the two rails (7) apart from each other. The reception of ballast gravel (26) for producing a recess of ballast is carried out in a region below of the sleeper head (25) of a ballast bed (33), which is located adjacent to the region of the old sleepers (6) along their longitudinal axis. The received ballast gravel is temporarily stored and, once the new sleepers (11) have been deposited thrown off for the , purpose of ballasting. In parallel and prior to the deposit of new sleepers (11), excess ballast gravel (26) is ploughed in the recess of ballast so …
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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
- Filed May 18, 2005 and granted March 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.