Pipette Core Member, Pipette, and Pipette Device

• US 20090317304A1
• Filed: 11/22/2007
• Published: 12/24/2009
• Est. Priority Date: 11/22/2006
• Status: Active Grant

• Current Assignee: Kazusa DNA Research Institute, Nepa Gene Co., Ltd.
• Original Assignee: Altair Corporation, Kazusa DNA Research Institute, Nano Fusion Technologies, Inc.
• Inventors: Ohara, Osamu, Yanagisawa, Ichiro, Hirafuji, Mamoru, Eda, Shigeto, Tominaga, Ichiro
• Granted Patent: US 8,268,261 B2
• Time in Patent Office: Days
• US Class Current: 422/100
• CPC Class Codes: B01L 3/022 Capillary pipettes, i.e. having very small bore B01L3/0224 - B01L3/0237 take precedence
• CPC Class Codes: B01L 3/0227 Details of motor drive means B01L3/0231, B01L3/0234 take precedence
• CPC Class Codes: C12M 33/04 by injection or suction, e.g. using pipettes, syringes, needles pipettes in general B01L3/02

Abstract

A pipette core member is used in a pipette for sampling a sample. This pipette core member includes: a pump body including a reservoir communicated with one suction/discharge port of an electroosmotic flow pump, the electroosmotic flow pump and the reservoir being integrally formed; and a capillary connected to the electroosmotic flow pump and communicated with the other suction/discharge port of the electroosmotic flow pump. The capillary is secured to the pump body.

Claims

1. A pipette core member used in a pipette for sampling a sample comprising:

a pump body wherein a reservoir storing a driving liquid is communicated with one suction/discharge port of an electroosmotic flow pump, the electroosmotic flow pump and the reservoir being integrally formed, and

a capillary connected to the electroosmotic flow pump and communicated with the other suction/discharge port of the electroosmotic flow pump,

wherein the capillary is secured to the pump body.

2. The pipette core member according to claim 1,

wherein the capillary is secured to the electroosmotic flow pump via a tube connecting the electroosmotic flow pump and the capillary.

3. The pipette core member according to claim 1,

wherein a flow path volume from the other suction/discharge port to a tip end of the capillary, opposite to a rear end connected to the electroosmotic flow pump, out of longitudinal ends of the capillary is 50 microliter or below.

4. The pipette core member according to claim 1,

wherein a length from the other suction/discharge port to the tip end of the capillary, opposite to the rear end connected to the electroosmotic flow pump, out of the longitudinal ends of the capillary is 18 cm or below.

5. The pipette core member according to claim 1,

wherein the pump body is formed with a length of 20 mm or below in an alignment direction of the electroosmotic flow pump and the reservoir, and a diameter of 8 mm or below around a central axis along the alignment direction.

6. The pipette core member according to claim 1, wherein the pump body is formed with a weight of 1 g or below.

7. A pipette comprising:

the pipette core member according to claim 1, and

a pipette body that contains the pipette core member inside,

wherein the pipette body holds the pipette core member inside with the tip end of the capillary extending outward.

8. The pipette according to claim 7,

wherein the pipette body has a shape of a pen housing and holds the pipette core member therein with the tip end of the capillary extending outward from one end of the pipette body in an axial direction of the pen housing.

9. A pipette device comprising:

the pipette according to claim 7,

a controller that controls the electroosmotic flow pump, and a control signal line that electronically connects the electroosmotic flow pump and the controller and transmits a control signal output from the controller to the electroosmotic flow pump.