Noncombustible hydrogen gas containing atmospheres and their production
US5615742A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1995 |
| Grant date | Apr 1, 1997 |
| Priority date | — |
| Expiry date | Sep 15, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA62D1/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method for extinguishing hydrogen fires comprises introducing to the hydrogen fire a fire extinguishing concentration of 1,1,1,2,3,3,3-heptafluoropropane and maintaining the concentration until the fire is extinguished. The method includes heptafluoropropane at a range of 13-30% volume/volume in the air. The fire extinguishing methods also include the use of heptafluoropropane in blend with other fire extinguishing compounds. Also disclosed are atmospheres of hydrogen, an oxidizer, and a sufficient amount of 1,1,1,2,3,3,3-heptafluoropropane to render the atmosphere incapable of supporting combustion of the hydrogen, as well as related methods for preparing such atmospheres.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.