Flow passage switching valve, flow passage switching valve system, and liquid chromatograph
US12247959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2020 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Jun 3, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flowpath switch valve is configured for extended service life by spreading the region, of the sliding surfaces of a stator and a rotor, that is subject to wear over the entirety of the sliding surfaces. The stator has fixed stator flowpaths, and the rotor has rotor flowpaths. A flowpath switch valve, depending on the rotor rotation state, realizes connection patterns that include: a first connection pattern wherein a rotor flowpath 241 connects a fixed stator flowpath 31 and a fixed stator flowpath 32; a second connection pattern wherein the rotor flowpath 241 connects the fixed stator flowpath 31 and a fixed stator flowpath 36; a third connection pattern wherein a rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 32; and a fourth connection pattern wherein the rotor flowpath 242 connects the fixed stator flowpath 31 and the fixed stator flowpath 36.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.