Heat sensitive fire safe valve energy assist device
US4505291A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 1983 |
| Grant date | Mar 19, 1985 |
| Priority date | — |
| Expiry date | Aug 11, 2003 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K17/383
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Disclosed is a heat sensitive fire-safe valve energy assist device. The device includes a cup that is mountable exterior of the valve body to transmit forces thereto. The device also includes a pusher that is mountable about the valve stem to transmit force thereto. A spring or the like is provided for urging the cup and pusher axially apart, thereby to apply outwardly directed forces between the stem and the valve body. A fusible element is provided for releasably interlocking the pusher and cup at normal operating temperatures, but for allowing the pusher and cup to move with respect to each other when temperatures exceed a preselected level. The movement of the pusher with respect to the cup is limited, thereby to reduce the risk of injury to operating personnel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.