Sondes for locating underground pipes and conduits
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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May 22, 2007
Grant Date -
Jan 12, 2006
app pub date -
Jul 8, 2004
filing date -
Jul 8, 2004
priority date (Note) -
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Abstract
A sonde includes an elongate flexible ferromagnetic core and a coil surrounds an intermediate segment of the core. A housing surrounds and supports the coil. An electronic drive circuit is mounted in the housing for supplying the coil with an electric signal that will induce the core to emit electromagnetic signals at a predetermined strength and frequency that can be remotely detected. Self-contained battery powered float-type and pill-type sondes are also disclosed.
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