Pipe joints or couplings – With assembly means or feature – Molded joint facilitator
Patent
1986-11-12
1988-09-13
Arola, Dave W.
Pipe joints or couplings
With assembly means or feature
Molded joint facilitator
285906, 219535, 1562739, F16L 4702
Patent
active
047704420
ABSTRACT:
An electroweld fitting or electroweld collar for synthetic resin pipes comprising a body of a thermoplastic and/or weldable synthetic resin, on the inner surface of which a heating coil is arranged. In order to weld an electric current is conducted to the heating coil, whereby the material of the body is strongly heated and becomes plastic. The invention solves the problem of reliably applying the contact pressure in the welding zone while using a reduced amount of material. To achieve this it is proposed that a reinforcement in the form of a winding or a tube be arranged on the outer surface of the body and that the thermal coefficient of expansion of the reinforcement be smaller than that of the body.
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Arola Dave W.
Friedrichsfeld GmbH Keramik-und Kunststoffwerke
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