Low-pressure gradient device

Patent metadata

Field	Value
Publication number	US-8985144-B2
Application number	US-201113330839-A
Country	US
Kind code	B2
Filing date	Dec 20, 2011
Priority date	Jul 5, 2011
Publication date	Mar 24, 2015
Grant date	Mar 24, 2015

Abstract

A plurality of suctioning flow paths for suctioning mobile phases meet each other at a meeting portion. The meeting portion is connected to an inlet flow path communicating with an inlet of a reciprocating pump. The suctioning flow paths are respectively provided with solenoid valves for opening and closing the respective flow paths. The suctioning flow paths are respectively provided with orifices between the solenoid valves and the meeting portion. The orifices are sections of the respective suctioning flow paths having smaller diameters.

First claim

The invention claimed is:

1. A low-pressure gradient device comprising:
a reciprocating pump for sending a liquid by suctioning and discharging the liquid;
a first suctioning flow path for introducing a first mobile phase into the reciprocating pump;
a second suctioning flow path for introducing a second mobile phase into the reciprocating pump;
a meeting portion where the first suctioning flow path and the second suctioning flow path meet each other;
an inlet flow path co…

Assignees

• Aso Yoshiaki
• Inoue Fujio
• Shimadzu Corp

Inventors

• Aso Yoshiaki
• Inoue Fujio

Classifications

• Y10T137/87684

  Cross-Sectional Technologies · mapped topic

• Y10T137/85978

  Cross-Sectional Technologies · mapped topic

• G01N30/34 Primary

  Physics · mapped topic