Threaded pipe joint having improved seal ring entrapment
CA 2002687 A1 · Owner: Read, Shannon R. · Inventors: Read, Shannon R.; Read, Shannon R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The box end of a threaded joint has an interior profile of an inwardly tapered threaded section followed by a smooth, sealing surface parallel to the longitudinal axis of the threaded joint, followed by an increased diameter seal ring groove followed by an inwardly tapered smooth sealing surface. The pin end of the joint has an external torque shoulder followed by an, inwardly tapered threaded section followed by a reduced diameter, pipe dope reservoir followed by an extrusion hump used to, extrude a deformable seal ring used in the seal ring groove followed by an inwardly tapered smooth sealing surface. When the threaded joint is fully made up, the entrapped seal ring has a primary …
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
- Filed November 10, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 10, 2011.
- 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.