Fluid flow control freeze/thaw valve for narrow bore capillaries or microfluidic devices
US6557575B1 · kind B1 · utility
30Cited by
19References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2001 |
| Grant date | May 6, 2003 |
| Priority date | — |
| Expiry date | Nov 19, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/4643
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and devices for the management of fluid flow within nanoscale analytical systems, comprising a freeze thaw valve having differing geomentries to constrict a frozen plug within the freeze thaw segment. The freeze thaw valve is directed to use in high-pressure analytical systems. The geometry of an inner diameter of a channel or tube within a freeze thaw segment is configured to cause constriction of a freeze plug when axial force is applied. The constriction is used in the flow-path of a freeze thaw valve to prevent movement of the frozen plug at high pressures to avoid valve leakage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.