Low differential, pilot operated fluid pressure regulation apparatus and method
US6354319B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Jun 7, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7787
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An apparatus and method for regulating the pressure of fluid flowing though a conduit system according to which a valve seat is formed in a lower housing connecting in the conduit system with the seat extending between an upstream portion of the system and a downstream portion of the system. A valve stem is mounted in the lower housing for axial movement in the lower housing and one end of the stem is connected to a valve head. Two spaced membranes are mounted in the upper housing to define two chambers, and the membranes are connected to the valve stem . The downstream portion of the conduit system is connected to one of the chambers to apply a load to of the membranes in proportion to the fluid pressure in the downstream portion so that changes in the fluid pressure in the downstream portion causes corresponding changes to the load on the one membrane, corresponding movement of the valve stem and the valve head, and corresponding changes to the fluid flow through the lower housing. The upstream portion of the conduit system is connected to the other chamber to apply a load to the other membrane in proportion to the fluid pressure in the upstream portion so that changes in the ups…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.