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:
Jan. 17, 2017
Filed:
Jan. 15, 2014
Applicant:
Valco Instruments Company, L.p., Houston, TX (US);
Inventors:
Stanley D. Stearns, Houston, TX (US);
Ales Plistil, Houston, TX (US);
Assignee:
Valco Instruments Company, L.P., Houston, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 30/20 (2006.01); F04B 19/00 (2006.01); F04B 7/00 (2006.01); F04B 13/00 (2006.01);
U.S. Cl.
CPC ...
F04B 19/006 (2013.01); F04B 7/0007 (2013.01); F04B 13/00 (2013.01); G01N 30/20 (2013.01);
Abstract
A combined pump-injector valve utilizing a single piece as the barrel of the pump and as the stator of the valve, thus eliminating any need for connections between a pump and a valve, and therefore the potential for high-pressure leaks or pressure reductions. The combined pump-injector valve permits injection of nanoliter-sized samples into a chromatographic column, which is sealed during loading of the sample and filling of the pump, such that complete analyses can be completed with microliters of mobile phase with nanoliters of a sample.