Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1994-03-15
1995-10-31
Nicholson, Eric K.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285284, F16L 4702
Patent
active
054623146
ABSTRACT:
An electro-fusion fitting includes a body which is provided with a heater including a magnetic alloy unit having a predetermined Curie temperature in the vicinity of a joint surface thereof in a manner that a surface of the heater is exposed on the joint surface. The joint surface of the body is brought into contact with a joint surface of a member to be coupled and, if a high-frequency current is applied to the magnetic alloy unit by electromagnetic induction, the magnetic alloy unit generates heat, and a temperature of the magnetic alloy unit is kept at the predetermined Curie temperature due to a temperature self-control function thereof. Therefore, if the Curie temperature is set at a fusion temperature, the joint surfaces of the body and the member to be coupled are coupled to each other.
REFERENCES:
patent: 2739829 (1956-03-01), Pedlow et al.
patent: 3907625 (1975-09-01), Vogelsanger
patent: 4792374 (1988-12-01), Rianda
patent: 4865674 (1989-09-01), Durkin
patent: 5107095 (1992-04-01), Derbyshire
patent: 5125690 (1992-06-01), Taylor et al.
patent: 5254824 (1993-10-01), Chamberlain et al.
Goto Yuichiro
Harada Takatomo
Kasa Hideki
Gas Research Institute
Nicholson Eric K.
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