Underground pipe locating apparatus

Details Underground pipe locating apparatus Underground pipe locating apparatus

1990-11-23

1992-09-29

Snow, Walter E.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

G01V 330

Patent

active

051516578

ABSTRACT:
Apparatus intended to be used with equipment that is inserted into an underground pipe or conduit, which equipment may include a head that is attached to a member such as a hose or cable, which has a wire attached thereto along its length, the wire is connected to a signal generator which provides a signal to be detected by a receiver above ground to provide the location of the member and its depth. The antenna wire is of a highly electrically conductive metal, such as copper. The construction of the wire may be coaxial employing a flexible, yet rigid, spiraled coil steel cable which surrounds the antenna wire.

REFERENCES:
patent: 3597680 (1971-08-01), Haddon
patent: 3893025 (1975-07-01), Humphreys, Jr.
patent: 3975735 (1976-08-01), McCullough et al.
patent: 4449098 (1984-05-01), Nakamura et al.
patent: 4573829 (1986-03-01), Keene et al.

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