Pressure reducing valve with shut off
US11144077B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 5, 2018 |
| Grant date | Oct 12, 2021 |
| Priority date | — |
| Expiry date | Apr 2, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7808
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure reducing valve (IOO) includes a displaceable throttling element (51) displaceable between a fully-open position in which fluid flows along a flow path from an inlet (11) to an outlet (45), and a closed position in which the flow path is blocked. A spring (6) acts to displace the displaceable throttling element to the fully-open position while pressure within a control chamber (54) acts on a pressure-actuated surface to displace the displaceable throttling element towards the closed position. A switchable hydraulic control circuit in fluid connection with the inlet, the outlet and the control chamber, is switchable between first state in which a pressure within the control chamber is equalized with the outlet pressure, and a second state in which the pressure within the control chamber is equalized with an inlet pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.