Electrically insulating railway rails from rail- fastening means
CA 1234377 A · Owner: Pandrol Limited · Inventors: Brown, Trevor P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to electrically insulate a flange-footed railway rail from a clip that bears downwardly upon the upper surface of the rail flange and from an anchorage at one side of the rail flange there is provided an electrically insulating member with a first portion that is interposed between the rail clip and the upper surface of the rail flange. A second portion of the electrically insulating member is interposed between the edge of the rail flange and the anchorage. The electrically insulating member also includes a metallic reinforcing member having an elongate portion that has a flat lower surface and which is interposed between the rail clip and the first portion of the electrically …
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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
- Granted March 22, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 22, 2005.
- 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.