Flow cytometry system with stepper flow control valve
US10871438B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2017 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | May 6, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/1438
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system, method, and apparatus are provided for flow cytometry. In one example, the flow cytometry system includes dual laser devices and dual scatter channels to measure velocity of particles in a core stream of sample fluid. The total flow rate of the sample fluid and the sheath fluid around the sample fluid is controlled, and thus held constant, by a feedback control system controlling a vacuum pump based on differential pressure across ends of a flow channel in the flow cell. A stepper flow control valves are disclosed that apply a physical fluid resistance to a flow of sheath fluid in the flow cytometer. The physical fluid resistance regulates a flow rate of the sheath fluid and thereby regulates a flow rate of sample fluid in the flow cytometer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.