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. 11, 2024
Filed:
Mar. 13, 2019
Shimadzu Corporation, Kyoto, JP;
Tomohiro Gomi, Kyoto, JP;
Daisuke Kitabayashi, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
A liquid chromatograph includes a liquid sending pump for sending a mobile phase, a sample injector that injects a sample into an analysis flow path through which a mobile phase from the liquid sending pump flows, a separation column that is provided on the analysis flow path and is to separate a sample that has been injected into the analysis flow path by the sample injector into components, a pressure sensor for detecting a liquid sending pressure in the analysis flow path located at a position farther upstream than the separation column, a damper capacity holder that holds an internal capacity of a system through which a mobile phase from the liquid sending pump flows as a damper capacity, a reference value determiner configured to determine a reference value of a fluctuation range of the liquid sending pressure when a liquid sending failure of the liquid sending pump occurs, using at least the damper capacity held by the damper capacity holder, and a liquid sending failure detector that is configured to periodically acquire a liquid sending pressure detected by the pressure sensor, obtain a fluctuation range of the liquid sending pressure in a certain driving period of the liquid sending pump and detect a liquid sending failure using the obtained fluctuation range and the reference value determined by the reference value determiner.