Air flow control apparatus
US8267666B2 · kind B2 · utility
13Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2010 |
| Grant date | Sep 18, 2012 |
| Priority date | — |
| Expiry date | Mar 19, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8704
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus includes a valve housing having an inlet port, a first chamber with a first outlet port, and a second chamber with a second outlet port. A first valve opens between the inlet port and the first chamber under a first level of pneumatic pressure at the inlet port. A second valve opens between the first chamber and the second chamber under a second, greater level of pneumatic pressure in the first chamber. A third valve opens between the second chamber and the first chamber under a third level of pneumatic pressure in the second chamber, with the third level being less than the first level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.