Vent valve with pressure relief
US5944285A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 19, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Jun 19, 2017 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/71
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A selectively actuatable pressure relief valve (110) includes a housing (112) that defines an annular projection (118), an inlet port (120) in the lower surface (122), and a relief vent (124) in the sidewall. A first plunger (128) and a second plunger (138) are longitudinally disposed within the housing and are actuatable between an open position and closed position. The valve is normally biased in the open position by a pair of springs (136 and 146). The valve may be actuated between the open and closed positions by a solenoid (148) or may be locked into the closed position by the manual override device (154). When the valve is in the closed position, the spring may be overcome by the fluid pressure exceeding a predetermined limit, thereby displacing the valve into the open position and providing high pressure relief.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.