Pneumatic regulating pressure reducing valve
US5971013A · kind A · utility
3Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7793
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a pneumatic pressure-reducer, the control rod for the control valve is supported and guided by two spring washers whose radial stiffness is at least around 200 times greater than the axial stiffness. Each washer comprises internal and external annular regions connected by at least three inclined arms, separated by openings. Preferably, a restriction is formed between a region of the pressure-reducer situated downstream from the valve and a comparison chamber, the pressure of which acts on a comparison capsule connected to the rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.