Combination check-overpressure relief valve
US4341239A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Jul 14, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7883
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A combination check-overpressure relief valve includes a cylindrical main body portion defining a flow path through the valve and terminating in a curved lip portion having a radius of curvature extending perpendicularly to the flow path. The curved lip portion has a normally closed slit formed through it which opens to flow in one direction but checks flow in an opposite direction until a certain pressure is exceeded, at which the valve relieves to allow flow in the opposite direction. The valve will thereafter automatically reset to its original checking position once the pressure has dropped sufficiently. If desired the pressures at which flow can occur through the valve may be increased by providing the valve with stiffening ribs projecting radially outwardly of the main body portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.