Electro-weldable connecting piece having connection terminals and its method of manufacture
First Claim
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1. A connecting device for connecting two pipes therebetween, said pipes being at least partly made of a heat-weldable thermoplastic material, said connecting device comprising:
- a moldable body made of a heat-weldable thermoplastic material including a resistive element and connection terminals electrically connected to said resistive element;
said resistive element having a mesh structure comprising an electrical wire for heating said thermoplastic material of the body and welding it with the thermoplastic material of the pipes;
said resistive element being embedded in the thermoplastic material of said device body;
said connection terminals each being riveted through the mesh of said resistive element, and each terminal being partially embedded and molded within the thermoplastic material of said device body and extending therethrough so as to emerge outwardly on an outer surface thereof; and
wherein each of said terminals includes a tubular rivet body made of an electrically conductive material so as to be an electrical connector, said tubular rivet body including a collar integrally formed with a hollow shaft and a flanged portion bent over said collar for immobilizing said resistive element between said collar and flanged portion.
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Abstract
A connecting device for connecting two thermoplastic pipes together including a thermoplastic body having a resistive element having a wire mesh structure and connection terminals. Each of the connection terminals has a tubular rivet body made of an electrically conductive material. The tubular rivet body includes a collar integrally formed with a hollow shaft and a flanged portion bent to immobilize the resistive mesh after the connection terminals are riveted to the mesh. This increases the reliability of the connection terminals to the resistive mesh.
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Citations
10 Claims
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1. A connecting device for connecting two pipes therebetween, said pipes being at least partly made of a heat-weldable thermoplastic material, said connecting device comprising:
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a moldable body made of a heat-weldable thermoplastic material including a resistive element and connection terminals electrically connected to said resistive element; said resistive element having a mesh structure comprising an electrical wire for heating said thermoplastic material of the body and welding it with the thermoplastic material of the pipes; said resistive element being embedded in the thermoplastic material of said device body; said connection terminals each being riveted through the mesh of said resistive element, and each terminal being partially embedded and molded within the thermoplastic material of said device body and extending therethrough so as to emerge outwardly on an outer surface thereof; and wherein each of said terminals includes a tubular rivet body made of an electrically conductive material so as to be an electrical connector, said tubular rivet body including a collar integrally formed with a hollow shaft and a flanged portion bent over said collar for immobilizing said resistive element between said collar and flanged portion. - View Dependent Claims (2, 3, 4)
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5. A connecting device for connecting two pipes therebetween, said pipes being at least partly made of a heat-weldable thermoplastic material, said device comprising:
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a body made of a heat-weldable thermoplastic material including a resistive element and connection terminals electrically connected to said resistive element; said resistive element having a mesh structure comprising an electrical wire coated with an electrically insulating film for heating said thermoplastic material of the body and welding it with the thermoplastic material of the pipes; said connection terminals each being riveted through the mesh of said resistive element and extending through said device body so as to emerge outwardly on an outer surface thereof; wherein each of said terminals comprises; a tubular rivet body made of an electrically conductive material so as to be an electrical connector, said tubular rivet body including a collar integrally formed with a hollow shaft and a flanged part bent over said collar for immobilizing said resistive element therebetween; and rupture means for tearing said electrical insulating film of the wire upon riveting of the rivet body so as to ensure an electrical contact with said wire, said rupture means being disposed between said flanged part and said collar and extending around said mesh through which the corresponding connection terminal is engaged. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification