Pressure control valve
US3946756A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | May 30, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7811
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pressure control valve for use in conjunction with a riser for supplying water, in case of a fire, at all levels of a multiple story structure at a predetermined regulated static and flowing discharge pressure. The valve includes a hand wheel on a stem engaging the valve, a normally inaccessible static pressure control collar on said stem and a diaphragm sensitive to flowing discharge pressure at the discharge side of the valve tending to close the valve and a spring opposing the diaphragm, said hand wheel arranged to move said valve stem relative to said diaphragm and close the valve without altering the pressure adjustment thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.