Modulating positive shutoff mechanism
US5040559A · kind A · utility
14Cited by
9References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1990 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Mar 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0318
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A system is utilized for controlling the flow of process fluid between an input port and an output port of a valve. A first mechanism controls the modulation of the valve and a second mechanism controls the positive shutoff. An electrical system is responsible for modulation adjustments and a pneumatic system is responsible for positive shutoff control. A third, hydraulic, system is responsible for equalizing the pressure of the process fluid within the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.