Rail road car truck with rocking sideframe
CA 2396525 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 does not have lateral , underslung cross bracing in the nature of a transom a frame brace, or lateral , rods. The truck 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 on rockers or 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.
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 August 1, 2002 and granted August 27, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2024.
- 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.