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:
Nov. 16, 2021
Filed:
Dec. 11, 2019
Applicant:
Valco Instruments Company, L.p., Houston, TX (US);
Inventors:
Stanley D. Stearns, Houston, TX (US);
Ales Plistil, Houston, TX (US);
Assignee:
Valeo Instruments Company, L.P., Houston, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G01N 30/20 (2006.01); F16K 31/524 (2006.01); G01N 30/22 (2006.01); F16K 11/074 (2006.01); F16K 3/10 (2006.01); G01N 30/16 (2006.01);
U.S. Cl.
CPC ...
G01N 30/20 (2013.01); F16K 3/10 (2013.01); F16K 11/0743 (2013.01); F16K 31/52475 (2013.01); F16K 31/52483 (2013.01); G01N 30/22 (2013.01); G01N 30/16 (2013.01); G01N 2030/202 (2013.01);
Abstract
A valve is provided for use with liquid chromatography where liquid is provided to the chromatographic analysis equipment at more than one pressure, including up to ultra-high pressures. High and higher pressure operation are provided by application of force by an internal spring while avoiding wear of components by permitting higher pressure operation by mechanical engagement of an internal element to cause the internal spring to increase the force applied to the rotor, without the addition of external additional loading in the high pressure operation.