Device for regulating the flow of gases having substantially different molar masses
US6082398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1996 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Nov 19, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87788
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A device for regulating the flow of gases having substantially different molar masses, comprising PA1 an always-open feed line connected to a gas source at a defined pressure and to an apparatus PA1 a first calibrated restriction placed in the feed line, PA1 a bypass line connected via at least one of its two ends to a valve of a branching valve or a 4-way valve, placed in the feed line, and via the other end to a point of connection to the feed line, the valve being switchable between a first position for bringing the feed line into communication with the bypass line and a second position for isolating the bypass line from the feed line, and PA1 a second calibrated restriction placed in the bypass line, the first calibrated restriction being placed on the feed line portion lying between the valve and the point of connection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.