Bogie coupling system for convertible railway-roadway vehicle
CA 2196882 C · Owner: Sims, Roger D. · Inventors: Larson, Ernest J. Jr.; Sims, Roger D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bogie (120) and a convertible roadway-railway trailer (160) for both roadway and railway use and a method of converting the trailer between roadway and railway mode, including a method of assembling and disassembling a plurality of such trailers (160) and bogies (120) into a train (113). A trailer (160) has retractable roadway tires (166) and three king pins (184 185) mounted on , the posterior end thereof forming a rigid coupling mechanism. A bogie (120) which is stored off a railway near a grade crossing has three king pin , engagement mechanisms (138 153) which are used to rigidly couple the bogie (120) to a trailer (160). To convert a first trailer (160) from roadway use to …
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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 August 8, 1994 and granted October 30, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2016.
- 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.