Rail road freight car with resilient suspension
CA 2707417 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
An auto rack rail road freight car is provided for carrying low density relatively high , value, relatively fragile lading. The car has a relatively soft suspension and an empty , vertical bounce natural frequency of less than 2.0 Hz. The car also has additional ballast to , increase the dead sprung weight of the car relative to the weight of the lading. In the , embodiments in which multi-unit articulated freight cars are employed such as , for auto rack , rail cars, the ballast is located preferentially toward the coupler end trucks. The trucks for , the railcar have an increased wheel base and damping located to provide a greater moment , arm and bearing face to encourage a higher …
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, 2001 and granted April 7, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2023.
- 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.