Pressure/thermal relief valve for fuel tank
US5111837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1991 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Jul 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/1812
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A poppet valve structure has a valve plug biased inwardly to close a vent opening (10). A connector member (40, 58) includes a cage (40) extending inwardly from the valve plug and a separately formed bottom plate (58) secured to the cage (40). The plate (58) defines a radially outwardly opening recess (64) and a first pair of axially spaced apart confronting surfaces. A spring abutment member (66) surrounds the plate (58) and defines a radially inwardly opening recess (74) and a second pair of confronting surfaces. The two pairs of surfaces confront and substantially contact each other. The recesses (64, 74) together define a substantially closed annular chamber. The chamber may be formed by a pair of confronting channels (64, 74) or defined axially between two flanges (61, 67) on the plate (58') and the abutment member (66'), respectively. A ring of fusible material (76) is cast in situ within the chamber to interconnect the plate (58) and the abutment member ( 66). At elevated temperatures, the fusible material (76) melts to allow the plate (58) and abutment member (66) to slide relative to each other and the plug to move outwardly away from the vent opening. The valve may be inc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.