Device for locating a boring machine
US5070462A · kind A · utility
74Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 12, 1989 |
| Grant date | Dec 3, 1991 |
| Priority date | — |
| Expiry date | Sep 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V3/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An assembly is disclosed herein for locating an underground object that is transmitting a relatively low frequency signal electromagentic field. Means are provided for scanning the earth's surface and homing in on the point where the magnetic field is strongest, and at that point, calculating the depth of the object based on the strength of the magnetic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.