Method for removing ballast from railroad tracks
CA 1093387 A · Owner: Knape, Fritz · Inventors: Knape, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for removing ballast from a railroad track using a ballast conditioning machine which removes ballast by means of a digging chain conveyor driven transversely through the ballast below the normal rail level. The machine travels on the rails on wheels and alternatively travels on caterpillar tracks over track sections from which switches or crossings were removed to give the conveyor full access to the ballast.
Read the whole patent
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 January 13, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 13, 1998.
- 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.