Emergency valve with test capability
US4848388A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 19, 1987 |
| Grant date | Jul 18, 1989 |
| Priority date | — |
| Expiry date | Oct 19, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1987
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Self actuating valve systems for fluid line networks comprising a main valving stem (3) with a driving-to-close bias spring (14) which is blocked by a detent ball (15) from closure against a valve seal (8), the ball itself being held by a removable pilot stem biassed to such holding action by a spring (17), the force of which can be automatically overcome at emergency temperature use condition by high force action of a shape memory spring (21). The main valving stem is manually resettable and the shape memory drivable pilot stem and related drive system are manually testable. A plurality of such valve systems are distributed in a fluid flow network for isolating an emergency temperature rise (e.g., fire region).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.