Coupling assembly having enhanced axial tension strength and method of installation of coupled underground duct
CA 2201221 A1 · Owner: Meunchen, Paul K. · Inventors: Meunchen, Paul K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a coupling assembly for conduit or pipe, comprising a tubular component, a coupler, an annular locking ring and, an annular sealing member wherein the coupling assembly is assembled by inserting the tubular component into the coupler, and when assembled the locking ring is disposed in a locking position between the coupler and the tubular component and the sealing member is disposed in a sealing position between the coupler and the tubular component and a, method for installing the coupled lengths of pipe. The coupling assembly provides a coupling which may be installed by pulling through a tunnel-like substantially horizontal borehole without the use of any …
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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
- Filed March 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- 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.