Electrofusion of electrofusion joint, method of confirming state of fusion and fusion joint suitable for use in the methods
CA 1321626 C · Owner: Uda, Naotake · Inventors: Handa, Takayuki; Uda, Naotake
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an electrofusion method in which an electrofusion joint having an electrical heating wire embedded in the inner peripheral region thereof is fitted on or laterally pressed against an end of a resin pipe and electrical current is supplied to the electrical resistance heating wire so as to melt and fuse the electrofusion joint. The joint is beforehand provided with an annular groove formed in the outer peripheral surface of the joint to reach a region near the electrical resistance heating wire. The invention is further directed to a method of confirming the state of fusion of an electrofusion joint in which the joint is beforehand provided with a …
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 August 24, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 24, 2010.
- 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.