Rail road car truck with bearing adapter and method
CA 2436504 C · Owner: National Steel Car Limited · Inventors: Forbes, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A swing motion rail road freight car truck is provided that has a truck bolster and a , pair of side frames, the truck bolster being mounted transversely relative to the side frames. , The side frames have spring seats for the groups of springs. The springs seats may be , rigidly mounted in the side frames. Friction dampers are provided in inboard and outboard , pairs. The biasing force on the dampers urges then to that act between the bolster ands and , sideframes to resist parallelogram deflection of the truck. The bearing adapters and , sideframe pedestal seats interact on a rolling linear contact interface that has a relatively , small radius of curvature.
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
- Filed July 31, 2003 and granted April 29, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2025.
- 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.