Fusible plug type pressure relief valve
US9702473B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2014 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Jan 28, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K24/04
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A fusible plug type pressure relief valve includes a housing, a valve element, a spring member, and a fusible piece. A valve passage is formed in the housing. A valve element is arranged at a closed position in the housing, the closed position being a position at which the valve element closes the valve passage. The valve element is movable to an open position at which the valve element opens the valve passage. The spring member presses the valve element in an open direction. The fusible piece supports the valve element against pressing force of the spring member. The fusible piece melts at not less than a predetermined melting temperature. An inner surface of a concave portion of the fusible piece contacts the valve element. The concave portion includes a tapered portion inclined relative to an axis line of the valve element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.