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Pipette core member, pipette, and pipette device

  • US 8,268,261 B2
  • Filed: 11/22/2007
  • Issued: 09/18/2012
  • Est. Priority Date: 11/22/2006
  • Status: Expired due to Fees
First Claim
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1. A pipette device comprising:

  • a pipette comprising;

    a pipette body; and

    a pipette core member retained inside the pipette body, the pipette core member comprising;

    a pump body comprising;

    an electroosmotic flow pump having a first suction/discharge port and a second suction/discharge port, wherein the electroosmotic flow pump further comprises a first electrode, a second electrode, and an electroosmotic material sandwiched between the first electrode and the second electrode; and

    a reservoir integrally formed with the electroosmotic flow pump, and configured to store a driving liquid and in liquid communication with the first suction/discharge port of the electroosmotic flow pump; and

    a capillary secured to the pump body and connected to the electroosmotic flow pump, wherein the capillary also communicates with the second suction/discharge port of the electroosmotic flow pump;

    a controller having a setting device that sets a voltage value of a control signal output that is used for retaining a sample in a tip end of the capillary of the pipette, wherein the setting device comprises;

    a switch device that switches polarity of the voltage value of the control signal output applied to the electroosmotic flow pump; and

    a multiplying factor setting device configured to multiply the voltage value by a predetermined multiplying factor; and

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

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