Fire-extinguishant system
US4356868A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 30, 1980 |
| Grant date | Nov 2, 1982 |
| Priority date | — |
| Expiry date | Jul 30, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A fire-extinguishant system includes a source of extinguishant, such as carbon dioxide, a fusible length of plastic tubing, such as one-half-inch-outside-diameter polyethylene tubing, with the end closed, and a conduit and valve system for connecting the extinguishant source to the fusible tubing. The valving system pressurizes the fusible tubing at a low pressure, and this low-pressure signal is coupled to a pilot input port in the valve system. When this low-pressure pilot signal is interrupted, the piloted valve switches to supply extinguishant at full pressure through the fusible tubing. If the fusible tubing has been melted, such as by a fire, the extinguishant exits through the melted portion to extinguish the fire. The low-pressure pilot signal can, however, be interrupted manually by the valve system. In this case, the full-pressure extinguishant supply to the fusible tube ruptures the tube and releases extinguishant. This provides a manual extinguishant control for the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.