Shimming of railway car primary suspensions
CA 2352173 A1 · Owner: Columbus Steel Castings Company · Inventors: Jones, William C. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compensation for wheel wear of a railway truck (10) to maintain a constant car floor height above a railroad track is provided by using shims (42). The shims (42), when are not in use, are attached to a suitable location on the railway truck. A method of compensation for wheel wear comprises generally the steps of providing a wheel wear compensating shim (42) that when not being , used, is removably attached to the underside (44) of the bearing housing (34) or another suitable location of the railway truck (10) lifting of the side , frame (22) of the railway truck (10) away from the primary suspension (32) disposing the compensating shim (42) between the side frame (22) and the …
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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 December 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2021.
- 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.