Pointing device carried by digging arm of excavator, for dynamically indicating location and direction of extension of underground cable
US5371959A · kind A · utility
8Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1992 |
| Grant date | Dec 13, 1994 |
| Priority date | — |
| Expiry date | Jul 29, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S37/906
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pointer intended for attachment to the digging arm of an excavator, is characterized by an elongated arm which can be pivoted on the digging arm using a drive whose driving movements are activated and controlled by the magnetic field generated by an underground cable, conduit or like conductor in a manner such as to cause the pointer to point towards the cable, conduit or like conductor independently of the position of the digging arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.