Capillary-based pressure threshold sensor for liquids and methods and apparatuses using same
US11977004B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | May 21, 2021 |
| Grant date | May 7, 2024 |
| Priority date | — |
| Expiry date | Jul 21, 2042 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3368
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Capillary-based pressure threshold sensors are provided for liquids that exploit the properties of hydrophobic, superhydrophobic, oleophobic and amphiphobic porous membranes to detect when fluid passes through the membrane in the event of the pressure across the membrane rising above the breakthrough pressure of a fluid. Example implementations are provided of different configurations for a capillary-based pressure threshold sensor, and of how a capillary-based pressure threshold sensor is used in a medication delivery device or other fluid delivery devices to detect occlusion or other fluid flow condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.