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1. 发明专利

CA1321626C ELECTROFUSION OF ELECTROFUSION JOINT, METHOD OF CONFIRMING STATE OF FUSION AND FUSION JOINT SUITABLE FOR USE IN THE METHODS 未知
公开(公告)号：CA1321626C
公开(公告)日：1993-08-24
申请号：CA605928
申请日：1989-07-18
申请人： HANDA, TAKAYUKI
发明人： HANDA, TAKAYUKI , UDA, NAOTAKE
IPC分类号： B29C65/00 , B29C65/34 , F16L47/03 , G05D23/275 , F16L35/00
摘要： 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 detection hole formed in the outer peripheral surface of the joint to reach a region near the electrical resistance heating wire. There is also disclosed an electrofusion joint comprising a detection hole formed in the outer peripheral surface of said joint to reach a region near said electrical resistance heating wire, a transparent or translucent heat-resistant lid embedded in or fixed to said joint so as to close said detection hole; and an electrofusion joint having an annular groove formed in the outer peripheral surface of said joint to reach a region near said electrical resistance heating wire, so as to define a pin- or bar-like core, and a stopper member provided above said core and capable of limiting the lift of said core.

2. 发明申请

WO1989003955A1 ELECTROFUSION JOINT 审中-公开
标题翻译：电磁接头
公开(公告)号：WO1989003955A1
公开(公告)日：1989-05-05
申请号：PCT/JP1988001077
申请日：1988-10-21
申请人： MITSUI PETROCHEMICAL INDUSTRIES, LTD. , HANDA, Takayuki , UDA, Naotake
发明人： MITSUI PETROCHEMICAL INDUSTRIES, LTD.
IPC分类号： F16L47/02
CPC分类号： F16L47/03 , B29C65/342 , B29C65/3468 , B29C65/3476 , B29C66/1122 , B29C66/5221 , B29C66/5229 , B29C66/91651 , B29C66/94
摘要： This invention relates to an electrofusion joint, in which the electric power is supplied to a heating wire, which is buried in a resin, to melt the resin and thereby connect pipes together, and more particularly to an electrofusion joint, in which a member to be connected to a sensor-carrying connector is molded unitarily with the joint with a code member, which is to be detected by the sensor, molded unitarily with the member to be connected. A code displayed on the code member is read by the sensor and judged by a control unit as the quantity of power supplied to the heating wire through the connector and the member to be connected, or as the time during which the electric current is thus supplied to the heating wire, whereby an electric power of a predetermined magnitude is supplied thereto.

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