The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 2016
Filed:
May. 04, 2012
Philip Herzog, Waldbronn, DE;
Konstantin Choikhet, Waldbronn, DE;
Klaus Witt, Waldbronn, DE;
Herbert Anderer, Waldbronn, DE;
Philip Herzog, Waldbronn, DE;
Konstantin Choikhet, Waldbronn, DE;
Klaus Witt, Waldbronn, DE;
Herbert Anderer, Waldbronn, DE;
Agilent Technologies, Inc., Santa Clara, CA (US);
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.