Flow-actuated trapped-pressure unloader valve
US6857444B2 · kind B2 · utility
18Cited by
18References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 25, 2002 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Jan 4, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87249
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention recites an unloader valve operable to direct a flow of fluid. The valve includes a housing having a bypass opening, an inlet opening, an outlet opening and an internal chamber between the inlet opening and the outlet opening. A shuttle valve is disposed within the internal chamber and is movable between a first position wherein the flow of fluid is substantially directed to the bypass opening and a second position wherein the flow of fluid is directed to the outlet opening. The shuttle valve includes an internal flow path having a venturi therein. A biasing member biases the shuttle valve in the first position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.