Reverse flow relief valve
US9273795B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Mar 1, 2016 |
| Priority date | — |
| Expiry date | May 13, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7759
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A bleed valve system includes a bleed valve, a valve regulator, a valve actuator and a reverse flow relief valve. The bleed valve is opened and closed to control a flow of bleed air from an upstream inlet to a downstream outlet. The valve regulator provides a servo pressure used to regulate the position of the bleed valve, and the valve actuator is mechanically connected to open/close the bleed valve based on the servo pressure provided by the valve regulator. The reverse flow relief valve compares a pressure upstream of the bleed valve to a pressure downstream of the bleed valve and in response to the downstream pressure exceeding the upstream pressure creates a fluid communication path between the servo pressure and an ambient pressure to decrease the servo pressure such that the bleed valve is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.