Patents Assigned to NAKA Instruments Co., Ltd.
  • Patent number: 7050165
    Abstract: A main unit, a lamp chamber, a graphite furnace analyzing section, a flame analyzing section, and a flame gas controller are sequentially placed from right to left. An autosampler is placed on the top of the lamp chamber. A housing section for a transformer and a power supply unit is provided behind the lamp chamber, the graphite furnace analyzing section, the flame analyzing section, and the flame gas controller. The housing section is used as a space for a power unit used for the whole atomic absorption spectrophotometer, as well as the graphite furnace analyzing section. The housing section is also used as space for a circuit board for controlling the whole atomic absorption photometer. The autosampler has a quadrangular sample tray. The autosampler drives an arm for holding an aspiration needle in the left and right directions and also in up and down directions.
    Type: Grant
    Filed: January 30, 2004
    Date of Patent: May 23, 2006
    Assignee: Hitachi Naka Instruments Co., Ltd.
    Inventors: Mitsuru Oonuma, Yoshimi Kasai, Hayato Tobe
  • Publication number: 20040184034
    Abstract: An object of the present invention is to provide an atomic absorption spectrophotometer having a small installed area, in which an autosampler can be easily adjusted with a high degree of accuracy, leading to easy maintenance.
    Type: Application
    Filed: January 30, 2004
    Publication date: September 23, 2004
    Applicant: Hitachi Naka Instruments Co., Ltd.
    Inventors: Mitsuru Oonuma, Yoshimi Kasai, Hayato Tobe
  • Publication number: 20040163962
    Abstract: A multi-capillary type electrophoresis analysis apparatus has a sample tray for containing a plurality of samples, wherein part of the sample tray is made from a conductive material. Samples are introduced by applying a high voltage from a high voltage power supply between the sample tray and a coupler in a state in which one-ends of the capillaries are inserted in the samples contained in the sample tray. The apparatus eliminates the necessity of individually inserting electrodes in a plurality of samples contained in the sample tray, thereby making easy works for analysis.
    Type: Application
    Filed: February 26, 2004
    Publication date: August 26, 2004
    Applicants: Hitachi, Ltd., Naka Instruments Co., Ltd.
    Inventors: Kazumichi Imai, Osamu Uchida
  • Patent number: 6740219
    Abstract: A multi-capillary type electrophoresis analysis apparatus has a sample tray for containing a plurality of samples, wherein part of the sample tray is made from a conductive material. Samples are introduced by applying a high voltage from a high voltage power supply between the sample tray and a coupler in a state in which one-ends of the capillaries are inserted in the samples contained in the sample tray. The apparatus eliminates the necessity of individually inserting electrodes in a plurality of samples contained in the sample tray, thereby making easy works for analysis.
    Type: Grant
    Filed: May 10, 2001
    Date of Patent: May 25, 2004
    Assignees: Hitachi, Ltd., Naka Instruments Co., Ltd.
    Inventors: Kazumichi Imai, Osamu Uchida
  • Patent number: 6325908
    Abstract: A multi-capillary type electrophoresis analysis apparatus has a sample tray for containing a plurality of samples, wherein part of the sample tray is made from a conductive material. Samples are introduced by applying a high voltage from a high voltage power supply between the sample tray and a coupler in a state in which one-ends of the capillaries are inserted in the samples contained in the sample tray. The apparatus eliminates the necessity of individually inserting electrodes in a plurality of samples contained in the sample tray, thereby making easy works for analysis.
    Type: Grant
    Filed: August 11, 1998
    Date of Patent: December 4, 2001
    Assignees: Hitachi, Ltd., NAKA Instruments Co., Ltd.
    Inventors: Kazumichi Imai, Osamu Uchida