Microfluidic flow restrictor and system
US10258741B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2016 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Dec 28, 2036 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3337
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Embodiments of the present invention relate to a microfluidic flow restrictor having a converging tapered inlet connected by a constant internal diameter section to a diverging tapered outlet having an outlet face and a smooth and gradual transition from the constant internal diameter section to the outlet face. This dual tapered capillary flow restrictor may be incorporated into a system such as a microfluidic circuit. Using a dual tapered capillary for accurate flow control together with a constant pressure source provides a more steady flow with reduced flow fluctuation caused by bubbles passing or pinning to the capillary end-face. Further, when connected in series, these dual tapered capillary flow restrictors may reduce noise in flow and pressure measurements, reduce bubble segmentation, and reduce bubble pinning.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.