Metal-to-metal wedge thread coupling connector
CA 1264784 C · Owner: Hydril Company · Inventors: Reeves, Doyle E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tubular connector for adjoining two adjacent joints comprising a first pin end on a first joint a, second pin end on a second joint and a tubular coupling member with suitable threads for mating with both pin ends. Each pin end is tapered and includes wedge threads. The wedge threads achieve a metal-to-metal seal upon makeup by providing a root-and-crest bearing surface prior to makeup. As an addition, a metal-to-metal conical seal can be provided in front of the most forward thread revolution on the pin ends. Further as an addition, an elastomeric seal can be provided in a circumferential groove just forward of the conical seal for making a compound seal therewith. A corrosion barrier …
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
- Granted January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
- 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.