Differential pressure regulating valve and liquid shut-off valve device
US6003539A · kind A · utility
55Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1999 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jan 20, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86324
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A differential pressure regulating valve is disclosed which improves sealing performance when the valve closes. The differential pressure regulating valve has a diaphragm and a guide. The guide limits the moving direction of a retainer. A projecting part and an engaging hole engage with one another and reduce deformation of the diaphragm by tolerating a relative movement between the diaphragm and the retainer. A liquid shut-off valve device is also disclosed which incorporates the differential pressure regulating valve and has stable operating characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.