Ballast cleaner
CA 1069763 A · Owner: Canron · Inventors: Stewart, John K.; Von Beckmann, Helmuth
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A screening device suitable for cleaning railroad ballast which has become fouled with use, and of the type in which ballast to be cleaned is fed into a screen member to separate the coarse or ballast stone from the fines, the stone being reused to ballast the track. A screen member of generally frusto-conical shape, open at each end is rotatably mounted on a, track running frame with the axis of the screen extending substantially parallel to the track and either horizontal or slightly inclined to the horizontal. The screen member is rotated so that centrifugal action results in the fouled ballast, loaded into the narrower open end of the screen member, moving up the walls thereof to its …
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 15, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 15, 1997.
- 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.