Gas mixing and flow smoothing apparatus
US4576159A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1984 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Feb 23, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87684
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Gas mixing and flow smoothing apparatus for use in for example an anaesthesia system comprises a mixing chamber (8) which receives the flow of two or more gases via control valves (6,7). The mixing chamber (8) is adapted to absorb fluctuations in the pressure of the gases therein through the provision of for example a spring-loaded piston (not shown) which forms one wall of the chamber, and the pressure at the outlet (30) from the chamber (8) is maintained at a substantially constant pressure by means of a valve (9). If desired, further attenuation of the gas flow may be achieved through the provision of a second series arrangement of surge damper (11) and back pressure valve (10) located downstream from the valve (9).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.