Crossing assembly for point switches and processing
CA 2263689 C · Owner: Innovatiestichting High Rail Tech · Inventors: Lochschmidt, Oswald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The rigid frog for switch points and crossings with two wing rails (1, 2) and a frog point (3, 6 4, 5) arranged, therebetween, which forms with the wing rails switch openings (11) that run at an acute angle relative to each other is characterized in that the frog point and the wing rails are elastically joined by anchor clamps on each foot side to ribbed plates (247-253). The previous unit of a rigid frog with wing rails and HB bolted point is thus resolved to individual rails. The individual rails each have their own intrinsic elasticity so that the frog behaves like a normal rail in the track in terms of oscillation and damping behavior. The previously used filling plates are no longer …
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 21, 1997 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 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.