Valve particularly useful in fire extinguishing systems
US5464064A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1993 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Dec 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1797
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
This disclosure relates to a valve including a valve member having: a predetermined surface area on its inlet side exposed to the inlet pressure to produce a force tending to move the valve member to an open position; a larger surface area on its opposite, control side exposed to the inlet pressure to produce a larger force tending to move the valve member to its closed position; a passageway through the valve member; a restrictor orifice in the passageway; and a one-way valve in the passageway permitting fluid flow only from the inlet side to the control side of the valve member, to prevent unintentional opening of the valve member in the event of a drop in the inlet pressure followed by the resumption of the inlet pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.