Fluid switching valve and liquid chromatograph apparatus using the same
US10364900B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 2015 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Aug 6, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2030/385
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Provided are: a flow path switching valve that reduces the pressure load in a contact surface outer peripheral section of the flow path switching valve and inhibits friction between constituent components; and a liquid chromatographic device using the flow path switching valve. The flow path switching valve is provided with a stator having a plurality of through holes and a seal having conduction grooves for causing the through holes to conduct. The seal has a first portion present vertically beneath a region comprising at least a surface of contact with the stator, and a second portion having lower rigidity than the first portion, on the outside of the first portion. Due to this configuration, it is possible to reduce the pressure load when a flow path of a liquid is switched under high-pressure conditions, and inhibit the phenomenon of friction itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.