Surge relief apparatus and method
US5396923A · kind A · utility
Inventors
Key dates
| Filing date | Oct 28, 1992 |
| Grant date | Mar 14, 1995 |
| Priority date | — |
| Expiry date | Oct 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/777
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A surge relief apparatus for sensing, tracking and responding to pressure changes in a flow system to prevent damage caused by transient pressure changes in the flow system having one or more conduits with fluid. The surge relief apparatus comprising a transient pressure sensor, a pressure sensor, a regular and a valve. The transient pressure sensor is in communication with an upstream conduit and is responsive only to the fluid in the flow system for sensing transient pressure changes and for generating a first signal continuously proportional to the rate of change of the pressure. The pressure level sensor is in communication with an upstream conduit and is responsive only to the fluid in the flow system for sensing pressure changes in the flow system and for generating a second signal continuously proportional to the pressure level in the system. The regulator is responsive only to the first and second signals from the sensors for producing a discharge signal when either the rate of the transient pressure change is greater than a predetermined value or the pressure level in the system exceeds a preestablished value, the discharge signal for continuously tracking the pressure dif…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.