Telescoping joint
CA 1329488 C · Owner: Cooper Industries, Inc. · Inventors: Troxell, John N. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved telescoping joint suitable for use in repair of subsea pipelines including an inner tubular member, an outer tubular member for receiving the inner tubular member therein, pressure responsive means for extending the joint by causing relative extending movement between the members, pressure responsive means for retracting the joint by causing relative retracting movement between the members, pressure responsive locking means for camming gripping elements into tight locking engagement between the members, and a pressure responsive sealing means for providing a metal-to-metal seal between the members upstream of said extending means said retracting, means and said locking means. …
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 May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 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.