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Device for sucking liquid and method for sucking liquid

a technology of sucking liquid and liquid, applied in the direction of positive displacement liquid engine, laboratory glassware, instruments, etc., to achieve the effect of reducing the pressure of the liquid

Inactive Publication Date: 2006-07-13
HITACHI HIGH-TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about an apparatus for sucking liquid. It has a switching valve that can switch between multiple liquid suction portions and a pump. This means that suction is not influenced by other liquid suction portions. The suction processing times of each liquid suction portion are not widely different because switching is carried out at predetermined intervals. The invention also includes chambers that are each disposed in the liquid suction portions, and a pump for reducing pressure. This allows suction to be conducted regardless of the conditions of other liquid-introducing portions. Overall, the invention ensures efficient and uninfluenced suction of liquid.

Problems solved by technology

This varies the movement time of each sample and causes the suction processing time of each sample to fluctuate, thereby causing inconvenience where the suction of only one sample is finished and the suction of other samples is not completed.

Method used

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  • Device for sucking liquid and method for sucking liquid
  • Device for sucking liquid and method for sucking liquid
  • Device for sucking liquid and method for sucking liquid

Examples

Experimental program
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embodiment 1

[0028] In the following, an apparatus for sucking liquid according to the present embodiment is described with reference to FIGS. 1 to 10. The apparatus for sucking liquid in the present embodiment is an apparatus for extracting nucleic acid that utilizes a tip having a nucleic acid capturing carrier.

[0029]FIG. 2 shows the overall view of the apparatus for extracting nucleic acid, including a suction apparatus. In the present apparatus, two movable arms 16 and 19, both of which are capable of moving independently, are attached to a casing 100. A dispenser nozzle 17 for sucking and discharging samples is attached to the movable arm 16. In the same manner, a robot arm 18 for dispensing samples is attached to the movable arm 19. On an operation table 5, a tip rack 14, in which a plurality of types of tips for nucleic acid extraction, sample suction, and reagent suction are arranged, is disposed. The tips are used by the dispenser nozzle 17 and the robot arm 18.

[0030] A sample, such a...

embodiment 2

[0054] In the present embodiment, an apparatus for sucking liquid comprises a switching valve, namely, a channel-switching valve 33 disposed between the chamber 204 and the nucleic acid capturing container 31. FIG. 11 schematically shows a suction apparatus in the present embodiment. FIG. 12 shows a block diagram of the present embodiment. FIG. 13 shows an operation flow diagram. In the following, the difference from embodiment 1 is mainly described with reference to FIGS. 11 to 13.

[0055] A suction mechanism in the present embodiment comprises the nucleic acid capturing container 31, the chamber 204, multiple valve 205, the pump unit 201, and the channel-switching valve 33. A plurality of nucleic acid capturing containers 31 and chambers 204 are in communication via relatively thin channels. The channel-switching valve 33 is disposed on the channels. Also, each chamber 204 and the multiple valve 205 are in communication via relatively thick channels.

[0056] The channel-switching va...

embodiment 3

[0059] In the present embodiment, an apparatus for sucking liquid comprises channel opening / closing valves on both ends of a chamber. FIG. 14 schematically shows the present embodiment, FIG. 15 shows a block diagram of the present embodiment, and FIG. 16 shows an operation flow diagram. In the following, with reference to FIGS. 14 to 16, the features of the present embodiment are described as compared with embodiments 1 and 2.

[0060] In the present apparatus, the chambers 204 are disposed for a plurality of nucleic acid capturing containers 31. Channels from each chamber 204 are joined into a single channel and the channel is in communication with the suction motor 201. A first channel opening / closing valve 333 for enabling the control of communication is disposed between the nucleic acid capturing container 31 and the chamber 204. Also, a second channel opening / closing valve 334 is disposed between the chamber 204 and a location where the channels are joined.

[0061] The first chann...

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Abstract

When a plurality of liquids are simultaneously sucked using a plurality of suction paths connected to a single pump, one suction end may hinder other acts of suction. A multiple valve for connecting each suction path and the pump in a one-by-one manner is disposed between the plurality of suction paths and the pump. Suction is conducted while the communication between the suction paths and the pump is successively switched in a time-sharing manner. At a certain period of time, the pump and a given path is independent of other suction paths. Whereby, suction can be conducted without being influenced by suction ends of other suction paths.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus (a device) for sucking a plurality of liquids and a method thereof. For example, the present invention is applied to an apparatus for extracting nucleic acid that sucks a biological sample, such as blood, urine, or the like, held in a plurality of containers and to a method thereof. BACKGROUND ART [0002] Concerning prior art for sucking biological samples, JP Patent Publication (Kokai) No. 5-45365 A (1993) discloses the following technology, for example. First, a plurality of probes held in a single holding portion are simultaneously lowered into the inside of a plurality of sample containers, and a sample surface in the inside of each sample container is detected. Then, when the plurality of probes reach the highest sample surface, the probes are halted for a moment. While the plurality of probes are stationary, the reached probe sucks a sample. After the suction is ended, the plurality of probes are lowered again...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F04B39/00B01L3/00C40B60/14F04B13/02G01N1/00G01N35/10
CPCB01J2219/00286B01J2219/00353B01J2219/00391B01J2219/00689B01L3/50255B01L2300/0829B01L2400/0487B01L2400/049B01L2400/0622B01L2400/0644C40B60/14F04B13/02G01N1/14G01N35/10G01N35/1002G01N35/1097
Inventor SHOJI, YOSHIYUKIYOKOBAYASHI, TOSHIAKI
Owner HITACHI HIGH-TECH CORP