Flow controller
US4476708A · kind A · utility
8Cited by
11References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1982 |
| Grant date | Oct 16, 1984 |
| Priority date | — |
| Expiry date | Nov 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2572
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow controller primarily for breathing gas analysis has a gas flow circuit leading from a breathing air inlet to a gas analyzer and to a vacuum source. Another gas is bled into the circuit between the breathing air inlet and a point upstream of the vacuum source. Such other gas is precluded from flowing upstream in the circuit toward the gas analyzer by making the intervening flow path or conduit of suitable dimensions to have a Peclet number at least equal to 4 and preferably greater than 4 and about 6.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.