Regulated valve assembly for fire extinguishing systems
US8079567B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2005 |
| Grant date | Dec 20, 2011 |
| Priority date | — |
| Expiry date | Mar 29, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7722
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A valve assembly has a valve body having an inlet section for a pressurized fluid and an outlet. A piston is movable within the valve body between an open position and a closed position blocking fluid communication. The piston has an end section, a sealing section and a middle section located between the end section and the sealing section. A cavity receives the piston within the valve body. The cavity has a superior chamber, an intermediate chamber, and an inferior chamber. A spring within the superior chamber exerts a spring force onto the piston to urge the piston towards the open position. An actuator device provides upon actuation for a first flow of fluid outside the cavity from the inlet section to the superior chamber. The first flow causes a pressure within the superior chamber to increase until it is about the same as the pressure within the container so that the spring force moves the piston to the open position. In the open position a main flow of fluid flows from the inlet section via the intermediate chamber to the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.