Self-swaging threaded tubular connection
CA 2091854 C · Owner: Watts, John Dawson · Inventors: Watts, John Dawson
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An Integral Self-Swaging Threaded Tubular connection to connect ends of plain-end pipe or the like without the use of a coupling is disclosed that may be selectively tightened to various positions of make-up to effect strength efficiencies up to 100 with respect to the pipe body. Tapered pin threads (62) are formed on tubular member (60) for sealing cooperation with box threads (63) formed on tubular member (61) the threads being, dimensioned such that when they aye screwed together power tight, the box is swaged outwardly to a first predetermined configuration as at (90) and the pin is swaged inwardly to a second predetermined configuration as at (91) such that pin wail (92) at the last …
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 March 17, 1993 and granted December 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 17, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2015.
- 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.