Soil sampling tool with unique vent-and-seal features and related method
US5937953A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1997 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Jul 22, 2017 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B49/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A soil-sampling tool extends along a longitudinal axis and includes a barrel having a soil-penetrating distal end, and a cap for closing the end. In the improvement, the barrel has a seal surface spaced from the end and also has a tapered lead portion between the surface and the end. The lateral dimension of the lead portion is less than that of the seal surface. The cap includes an abutment face and a seal spaced therefrom. The barrel seal surface is spaced from the barrel end by a dimension not greater than that between the cap seal and its abutment face. In a highly preferred embodiment, the barrel has a stop shoulder between the barrel seal surface and the barrel end. The cap includes a lip bearing against the stop shoulder and a tapered cap face substantially contacting the barrel face of the tapered lead portion. The tool also relates to a new method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.