Variable pressure regulating valve
US4805658A · kind A · utility
11Cited by
18References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Apr 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2579
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pressure regulating valve 10 determines a fixed constant pressure drop across a metering valve 16 at a given altitude by comparing ambient pressure with a vacuum. Evacuated bellows 76 reacts with changes in altitude to bias a poppet 54 via rod 90, adjusting screw 100 and lever 66 towards or away from outlet 54.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.