Dynamically stable, lightweight railcar support system
CA 2214151 C · Owner: Spencer, Charles P. · Inventors: Spencer, Charles P.; Pitchford, Terry L.; Hawthorne, Vaughn Terrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A freight railcar undercarriage constant-contact sidebearing arrangement provides a load force transfer mechanism with a more direct or less redundant force transfer path between the railcar body with its lading and the sideframe and wheels of a truck assembly which system, obviates the present use of a bolster center plate structure for load transfer carries all the load, forces through the side bearing assemblies fulfills the dynamic operating requirements of the American Association of Railroads standards reduces the weight of the railcar while maintaining the load-carrying capacity and is particularly adaptable to three-piece truck assemblies in broad use on freight railcars.
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 September 9, 1997 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 9, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 9, 2019.
- 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.