초록 ▼

A method and apparatus for fusion joining polyethylene pipe. A power source supplies an input power to an input of a power supply. The input power has generally constant current and is converted to an output power at a relatively high frequency. The relatively high frequency output power is delivere

A method and apparatus for fusion joining polyethylene pipe. A power source supplies an input power to an input of a power supply. The input power has generally constant current and is converted to an output power at a relatively high frequency. The relatively high frequency output power is delivered to an installation tool. The output power delivered to the installation tool is controlled. The output power can be controlled as a function of ambient temperature surrounding the installation tool.

대표청구항 ▼

[ We claim:] [1.] A method of fusion joining polyethylene pipe with a coupling using an induction heating tool, the method comprising the steps of:supplying an input power from a power source to an input of a power supply;converting the input power to an output power at a high frequency;delivering t

[ We claim:] [1.] A method of fusion joining polyethylene pipe with a coupling using an induction heating tool, the method comprising the steps of:supplying an input power from a power source to an input of a power supply;converting the input power to an output power at a high frequency;delivering the converted high frequency output power to the induction heating tool at a generally constant voltage;controlling the delivery of the output power using a controller sensing a heat demand of the induction heating tool; andoperating the induction heating tool with the high frequency output power and generating an induction fusion between the coupling and the polyethylene pipe.