Sample system
US5396812A · kind A · utility
Inventor
Key dates
| Filing date | Nov 19, 1992 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Nov 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/2085
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improvements are set forth in the present disclosure for the sample taking system. It normally uses a valve which can be switched between two operative positions one delivering a sample. The valve lock mechanism is incorporated. Additional safety is provided by means of a blocking valve added to the circuit. These control the delivery of sample through a twin needle system which is inserted through the septum of a sample receiving container. That container is formed of a non-round shape supported in a mounting fixture which assures that it does not rotate to thereby avoid tearing the septum with the needles. In addition, a purge gas flow route is defined through the system and is discharged to atmosphere. This discharge is through a cartridge filter having duplicate ends. The ends are closed by membranes to permit inert gas to flow there through. The bottom membrane is pervious while the top membrane is impervious, but it is punctured by a needle to introduce the sample. The membranes, housing and particulate filter material are all combustible in a furnace for destruction of the equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.