Plate for supporting railway rails and a railway track assembly using it
CA 1318898 C · Owner: Pandrol Limited · Inventors: Schumaker, Jon Sutton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An elongate plate for use in a railway frog or, switch to receive two inclined rails which stand on the plate and on another plate like it and are to be anchored thereto, has an elongate hole through it with the length, of the hole being parallel to that of the plate. A recess is formed in the underneath face of the plate at one end of the elongate hole by counterboring after the elongate hole has been formed by punching the recess, forming a widening of the undersurface region of the elongate hole at that end thereof. The location of the elongate hole in the plate is such that when the rail stands on the plate, no part of the elongate hole or the recess lies directly vertically below the …
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
- Granted June 8, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 8, 2010.
- 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.