Device to provide failsafe mechanism on a valve actuator assembly
US9500289B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 20, 2014 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Oct 2, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K31/52
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Embodiments of a safety device that provides a failsafe mechanism on valve actuator assemblies. This failsafe mechanism operates in the event of power loss, or other problems and/or failures, that prevent operation of the drive components. In one embodiment, the safety device is configured to couple the drive components with the valve stem. During normal operation, this configuration changes the position of the valve stem in response to motive action of the drive components. In the event of power loss, the safety device is configured to operate independent of the drive components to change the position of the valve stem and, thus, move the valve to a closed or “safe” position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.