Weld joint
CA 1278442 C · Owner: Sundholm, Goran · Inventors: Sundholm, Goran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a weld joint for metal pipes. The object is to provide a weld joint which is easy to make and which has a clean surface inside the pipes. The ends of the pipes to be joined are flared and between the inner conical surfaces of the flared pipe ends is arranged a cylindrical metal sealing ring under axial compression, the edges of the ring being elastically bent inwards by said inner conical surfaces of the flared pipe ends. The sealing ring is preferably provided with a circumferential flange projecting out between the pipe ends, for facilitating correct positioning of the sealing ring. (Figure 1)
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 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 2, 2008.
- 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.