Valve actuating mechanism
US5374030A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1994 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Feb 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/18752
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improved valve plug actuator is provided which is substantially impervious to environmental contamination and which provides greater axial transfer of seating force to an associated valve plug. The actuator uses an indexing race formed in an indexing sleeve to support a thrust bearing on one side of an operating screw collar and an enhanced retaining ring to capture an opposing thrust bearing. Lubrication containment and environmental isolation of the interactive surfaces of the actuator is maintained by o-ring seals carried by the retaining ring and by a lowermost movable component of the actuator which also is rigidly affixed to the associated valve plug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.