Capillary flow control system for fluid indicator
US10330233B2 · kind B2 · utility
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2References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 2012 |
| Grant date | Jun 25, 2019 |
| Priority date | — |
| Expiry date | Oct 19, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG04B25/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A capillary system for a fluid indicator includes a fluid restrictor, and a capillary tube. The fluid restrictor has a small aperture formed therethrough. The capillary tube is adapted to receive a fluid. The fluid restrictor is sealingly affixed into at least one end of the capillary tube so that the small aperture communicates between the inside of the capillary tube and the outside of the capillary tube. The capillary tube is optionally treated so that an inner surface is oilophobic and hydrophobic. The system better controls the interface or meniscus 14 between the fluids contained in the capillary tube, preventing mixing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.