Drive point locking method and apparatus
US5542481A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1995 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Apr 10, 2015 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B25/00
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An assembly for locking the drive point at the forward end of an elongated sample tube includes a tapered drive point presenting a threaded chamber, a bolt having a threaded stem, a collar disposed about the stem and a locking member disposed about the stem and adapted for engaging a recess near the forward end of the tube. The bolt head may present a tool receiving slot for remotely releasing the locked drive point assembly. The bolt stem may include a recessed groove for receiving a setscrew through the drive point to ensure that the bolt does not become completely disengaged from the drive point when the point is released from the forward end of the sample tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.