Process to obtain an homogeneous mixture of liquid oxygen and liquid nitrogen
US5396935A · kind A · utility
3Cited by
7References
3Claims
0Family size
Inventor
Key dates
| Filing date | Sep 28, 1993 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Sep 28, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01G17/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A small container is filled with a mixture of oxygen and nitrogen in a predetermined and precise concentration from a source of liquid oxygen and liquid nitrogen automatically, safely, and without the possibility of a human error. The empty weight is verified. Liquid oxygen is directed to vessel. When the mass of liquid oxygen is stabilized at a preset value, liquid flow is stopped. A second pipe is cooled using liquid nitrogen, by emptying through this pipe to the atmosphere liquid nitrogen. The vessel is filled with liquid nitrogen, until the vessel is full. The correct proportion of oxygen/nitrogen is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.