Patent · US Active

Primary piston correction during transfer

US8182680B2 · kind B2 · utility

3Cited by

12References

19Claims

0Family size

Assignee

AGILENT TECHNOLOGIES, INC. · US

Inventors

Philip Herzog · Waldbronn, DE
Konstantin Choikhet · Karlsruhe, DE
Klaus Witt · Keltern, DE
Herbert Anderer · Waldbronn, DE

Key dates

Filing date	Apr 29, 2009
Grant date	May 22, 2012
Priority date	—
Expiry date	Apr 17, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/794
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for controlling operation of a pump unit, where the pump unit includes a primary piston pump having a primary piston and a secondary piston pump having a secondary piston. The primary piston pump is fluidically connected with the secondary piston pump. The primary piston pump includes an inlet valve and an outlet valve, and the pump unit operates periodically according to a pump cycle. The method includes determining a fluid pressure of fluid dispensed by the pump unit, and performing a closed loop control of a position of the primary piston in dependence on the fluid pressure of the fluid dispensed by the pump unit during a first time interval of the pump cycle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.