Bullet firing mechanism with retrieval cable
US4827823A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 17, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Dec 17, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
For use in a gun supporting a bullet for obtaining a core sample therein wherein the bullet is received in a chamber in the gun, a retrieval cable connecting between a pair of studs for threading to the bullet and gun, the cable being coiled to enable the cable and heads of the stud to be received in a sacrificial plastic cylindrical housing. An electrical flow path is also provided by means of a conductor optionally positioned adjacent an exploding cap and extending to an electrically isolated ground terminal. The ground terminal connects with ground through a compressed spring extending through the housing for contact against the ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.