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:
Dec. 24, 2024
Filed:
Jan. 11, 2023
Shimadzu Corporation, Kyoto, JP;
Kota Kamei, Kyoto, JP;
Daisuke Kitabayashi, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
A liquid chromatograph () includes a liquid-sending unit () for sending a mobile phase from a reservoir () to a column () through a tube () at a predetermined pressure. The unit () includes a pump () having a suction port () connected to the reservoir and an ejection port () connected to the tube directly or via another pump. A check valve () is provided for the ejection port. For the precompression process for opening this valve, a pressure application controller () controls the pressure applied to the mobile phase within the pump, based on the compressibility of the mobile phase and the amount of compression of the inner wall of the pump resulting from the pressure application, so as to reach the pressure at which the check valve opens before the mobile phase suctioned from the suction port is to be ejected from the ejection port.