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. 25, 2025
Filed:
Sep. 09, 2020
Shimadzu Corporation, Kyoto, JP;
Kengo Aoki, Kyoto, JP;
SHIMADZU CORPORATION, Kyoto, JP;
Abstract
A centrifugal field-flow fractionation device is provided with a controller for controlling introduction of a liquid sample by a sample introduction part and rotation of the rotor by a motor. The controller rotates the rotor at a first rotational speed when introducing the liquid sample into a flow path. The first rotational speed is faster than a second rotational speed. Therefore, when a liquid sample is introduced into the flow path, high centrifugal force can be applied to the liquid sample, which can suppress the variation of the particles in the liquid sample introduced to the flow path. The controller rotates the rotor at the second rotational speed slower than the first rotational speed with the liquid sample flow in the flow path stopped. Therefore, it is possible to prevent the constant application of high centrifugal force to the liquid sample, thereby suppressing the increase in the length of time required for analysis.