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:
Mar. 04, 2008
Filed:
May. 14, 2004
Yuki Togashi, Yokohama, JP;
Osamu Shirota, Yokohama, JP;
Aya Ohkubo, Yokohama, JP;
Shiseido Company, Ltd., Tokyo, JP;
Abstract
A sample injection apparatus and sample injection method capable of sufficiently reducing carry-over, having simple cleaning means for a short cleaning time period, a small influence of vibration of the cleaning means, and a small error in the amount of injected sample and preventing the durability of a sampling needle from being lowered, and a liquid chromatography apparatus having the sample injection apparatus are provided. The sample injection apparatus has a sampling vesselinto which a sample is supplied, a sampling needlefor aspirating and ejecting the sample, a cleaning partinto which a cleaning liquid for cleaning at least the sampling needleis supplied, a sample injection partfor injecting the sample ejected from the sampling needleinto a moving liquid, and needle transfer means for transferring the sampling needleamong the sampling vessel, the cleaning partand the sample injection part, wherein the cleaning parthas an ultrasonic vibrator for generating an ultrasonic wave in the cleaning liquid.