Method of and apparatus for applying a structural lining to a pipe
CA 1203719 A · Owner: Humes Limited · Inventors: Trippier, Kathleen; Kayser, Charles R.W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A PIPE", ABSTRACT OF THE DISCLOSURE A spraying device is drawn through an underground pipe and sprays a thixotropic resin onto the inner walls of the pipe. The resin cures and hardens, to form an internal lining to the pipe. The resin has sufficient thixotropy to enable it to be applied in a single operation to a significant thickness, preferably in the range 2 to 25 mm. The lining which is formed upon curing therefore has significant structural strength. To allow such a resin to be pumped from the surface down to the spraying device, along a significant length of tubing the resin is, firstly heated, prior to being pumped. Also disclosed is a swab for swabbing a pipe immediately prior to …
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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 April 29, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 29, 2003.
- 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.