Corrosive fluid two way check relief valve
US4440189A · kind A · utility
Inventor
Key dates
| Filing date | Sep 4, 1981 |
| Grant date | Apr 3, 1984 |
| Priority date | — |
| Expiry date | Sep 4, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7923
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A check relief valve particularly suited for use with corrosive fluids includes a body having an input port and an output port connecting a fluid passageway therebetween. A ring spring is mounted to the body along the fluid passageway. An annular sleeve is attached to the ring spring. A rod, having a sealing member at one end adapted to engage an annular edge of the sleeve, is lightly biased against the sleeve so that forward flowing fluid flows relatively unhindered while reverse fluid flow is checked. When the pressure at the output port is sufficiently greater than the pressure at the input port, the rod and moveable sleeve cause the ring spring to flex. After the rod has travelled a predetermined distance, movement of the rod is halted so that further movement of the sleeve breaks the seal with the sealing member to allow reverse flow of fluid. Also disclosed is a governor, which includes the check relief valve and pilot valve, for use between a pump, a system and a reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.