Breath sample device including flow regulation device for volatile and semi-volatile sampling
US12152968B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2022 |
| Grant date | Nov 26, 2024 |
| Priority date | — |
| Expiry date | Mar 22, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2001/248
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flow regulation device for volatile and semi-volatile sampling onto adsorbent media is provided. The flow regulation device includes a housing having an inlet, an outlet, a secondary inlet that is open to the ambient, a real time flow meter, a controller in electronic communication with the flow meter, and a three-way valve. Gas is drawn through the adsorbent media, into the inlet, and then to the outlet by a vacuum source joined to the outlet. The controller is configured to: (1) actuate the three-way valve to put the vacuum source in-line with the inlet; (2) continuously monitor the flow of gas through the inlet and calculate the time necessary to sample a pre-set volume of gas; and (3) after the pre-set volume of gas passes through the inlet, actuate the three-way valve to put the vacuum source in-line with the secondary inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.