Device for the in situ repair of a pipe
CA 1312457 C · Owner: Frey, Andre Francois · Inventors: Frey, Andre Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for the in situ repair of pipes (eg stormwater or sewerage) inaccessible from the inside comprises a front, module and a rear module each module being fitted with mobile arms and hydraulic displacement means connectable to an hydraulic pump at surface level. In their inoperative position the arms, form a diameter which is much smaller than that of the pipe to be repaired. In their operative position the arms form a, diameter which is either similar to or slightly smaller than that of the pipe to be repaired. The front module thus through, the pressure exerted by the arms on the damaged inside walls of the pipe, act both as a widener and as a guide to restore the, pipe to its …
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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 January 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 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.