Portable earth boring machine
US3938597A · kind A · utility
16Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 29, 1974 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Nov 29, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B7/062
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A portable earth boring machine for the horizontal boring of shafts and the insertion of pipeline casing sections in installations where excavation from the surface is undesirable. The machine is characterized by a steering head positioned at the front of the casings which steering head is automatically controlled so as to directionally control the direction of extension of the pipeline as the drilling operation progresses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.