Subsurface tool
US5487432A · kind A · utility
6Cited by
8References
6Claims
0Family size
Inventor
Key dates
| Filing date | Feb 22, 1995 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Feb 22, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B11/005
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A subsurface tool comprising an elongated steel shaft having a soil penetrating lower end element and having a threaded upper end, a transverse elongated handle having a pair of ends for manual gripping thereof, and a central zone, an elongated isolator between the shaft upper end and the handle, the isolator being an electrically insulating, reinforced polymeric composite having an upper end ring portion encircling and molded to the handle at its central zone, and having a lower end socket, the shaft upper end being attached to the isolator lower end socket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.