Device for facilitating the re-positioning of moveable rails or rail components
CA 2108540 C · Owner: Voest-Alpine Eisenbahnsysteme Aktiengesellschaft · Inventors: Durchschlag, Gerald; Klein, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a device for facilitating the repositioning of a rail having a rail base and which is moveable between first and second positions. The device includes rollers pressed against an underside of the rail base by the action of spring means when the rail is located between the first and second positions. The rollers are articulated to pivot, whereby, when the rail base is in one of those first and second positions, the rollers are pressed by the force of the spring so as to move in a direction above the underside of the rail base by a distance which is at least one-third the height of the rail base, and thus engage an edge of the rail base. The rollers can comprise separate …
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 October 15, 1993 and granted April 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 15, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 15, 2015.
- 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.