Production of constant composition gas mixture streams
US6382227B1 · kind B1 · utility
8Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1997 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Sep 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2499
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Gas mixtures having precise compositions are prepared by separately pumping the components in liquid phase through piping, vaporizing the components, blending the components and analyzing the mixture for composition. A signal sent to a control unit causes any necessary change in the rate of pumping of the liquid components to reduce the difference between the measured concentration and the desired concentration. When the composition is within desired limits it is charged into gas cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.