Metering device with defined enabled flow direction

US10473632B2 · kind B2 · utility

Assignee

• AGILENT TECHNOLOGIES, INC. · US

Inventors

• Daniel Thielsch · Neuenbürg, DE
• Thomas Ortmann · Ittersbach, DE

Key dates

• Filing date: Nov 10, 2014
• Grant date: Nov 12, 2019
• Expiry date: Mar 21, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2030/207
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A sample injector configured to introduce a sample fluid into a mobile phase, wherein the mobile phase is to be driven by a mobile phase drive through a separation unit for separating compounds of the sample fluid in the mobile phase, wherein the sample injector comprises a metering device being operable for displacing fluid and for intaking a metered amount of the sample fluid into the sample injector, an injector valve being switchable for operating the sample injector selectively in a sample intake mode in which the metering device is operable to intake the sample fluid from a sample container, or a separation mode in which intaken sample fluid is driven between the mobile phase drive and the separation unit for separating the compounds, and a flow direction controller configured for defining an enabled flow direction of fluid displaced by the metering device and for defining a disabled flow direction.