Undercutter with rotary trencher
CA 1317155 C · Owner: Tamper Corp. · Inventors: Cotsford, Stephen G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is described a railroad track maintenance machine having a horizontal track undercutter and a vertical rotary trench digging wheel at one side of the track. The bucket wheel is constructed such that there is lateral access into the wheel from the inner side of the bucket wheel and the buckets themselves are open on their inner sides. The undercutter is located with its delivery end adjacent to and spaced inwardly of the trenching wheel near its bottom center so that ballast removed by the undercutter is projected into the buckets through their open sides.
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 May 4, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 4, 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.