Hitachi Koki Co., Ltd.

Eppendorf Himac Technologies Co., Ltd.

Horiba, Ltd.

Hidetaka Osawa

Masahiro Inaniwa

Hiroyuki Takahashi

Kenji Yamada

Hiroshi Hayasaka

Tadashi Ohkawara

Hiroatsu Toi

Hisanobu Ooyama

Yuki Hodotsuka

Kouichi Akatsu

Hideki Hoshiba

Tetsuji Yamaguchi

Kenichi Nemoto

Masataka Morita

Ken Asakura

Kousuke Maeno

Masayuki Shiina

Hitoshi Watanabe

Toyosaku Sato

In a cell washing centrifuge for washing living cells such as blood cells, control of the remaining amount of a supernatant according to the related art greatly depends on controlling the rotation speed of a motor, and thus a highly accurate motor control part is required to prevent overshooting or the like. In place of the related art, an easy control method is required. In the discharging of a supernatant discharge by a centrifuge having a plurality of test tube holders that can radially swing through centrifugal force, a holding part using an electromagnet that can control the swinging of the test tube holders, and a cleaning liquid distribution element that supplies a cleaning liquid into a test tube, a first decanting operation ({circle around (3)}-1) is performed by rotating a rotor in the order of acceleration, settling, and deceleration in a state in which the agitating angle of the test tube is restricted and discharging the supernatant of the cleaning liquid from the test tube, and a second decanting operation ({circle around (3)}-2) is performed, at a time of a final decanting operation, by accelerating the rotor, releasing restriction on the agitating angle during the acceleration, and then decelerating the rotor.

Centrifuge that adjusts the amount of supernatant liquid that is discharged

A particle size distribution measurement device includes a cell holding bodythat holds a measurement cellcontaining a measurement sample and a dispersion medium and a reference cellcontaining a reference sample and is rotated by a motor, and a cell discrimination mechanismthat discriminates the cellspassing through a predetermined rotation position by using a magnetic force or electrostatic capacitance.

Centrifugal sedimentation-type particle size distribution measurement device

A centrifuge including: a rotor configured to hold a sample and configured to be detachably mounted, a rotation chamber accommodating the rotor, a plurality of motors configured to be rotationally driven by three-phase AC power, and a control device configured to control centrifuging operation, wherein one of the plurality of motors is a centrifuge motor configured to rotate the rotor, and the control device is configured to change distribution of power supplied to the centrifuge motor and power supplied to another motor of the plurality of motors during one operation.

Centrifuge having a plurality of inverters

A centrifuge includes a rotor which accommodates a sample, a motor which rotationally drives the rotor and a chiller which cools a rotor chamber, and is provided with a transformer which has a plurality of secondary side taps, converts an AC voltage which is input from a primary side to a plurality of voltages, and outputs, and a voltage switching unit which is connected to the plurality of secondary side taps of the transformer, selects any one of outputs of the secondary side taps, and outputs to the chiller. The microcomputer controls the voltage switching unit corresponding to the power supply frequency which is determined using the output of the zero-crossing detection circuit, and supplies the desired driving voltage to the chiller.

Centrifuge and power controlling apparatus including a voltage switching unit

A centrifuge including: a rotor configured to be driven by a motor and to hold a sample, a centrifuge inverter, a chamber accommodating the rotor, a temperature sensor configured to detect the temperature of the chamber, a cooling machine configured to cool the chamber and including a compressor, a compressor inverter, a compressor motor configured to be controlled in a variable speed and a control device, wherein the control device carries out a feedback control of the compressor motor based on a preset temperature and a detected temperature of the temperature sensor when the rotation number of the compressor motor is larger than a predetermined rotation number, and the control device carries out an intermittent control for turning ON-OFF the cooling function of the compressor when the rotation number of the compressor motor is smaller than a predetermined rotation number.

Centrifuge with compressor motor feedback control device

An automatic dispenser includes a dispensing head, a transporter, a controller, sensors, and an adjustor. The dispensing head accommodates a plurality of dispensing tips and draws liquid into and ejects liquid from the dispensing tips. The transporter moves the dispensing head within an XYZ space. The controller controls drawing and ejecting of liquid by the dispensing head and movement of the dispensing head by the transporter. The sensors detect whether dispensing tips are mounted in the dispensing head. The adjustor aligns the reference positions of the dispensing head and the sensors in the XY plane.

Automatic dispenser

In reagent reaction experiments using microplates, a desired period of time can be set for determining the time to introduce a reaction stop solution after introduction of a reagent. The set time is measured starting from the introduction of the reagent and the reaction stop solution is introduced immediately after expiration of the set time. A control device for an automatic liquid handling system having the above-described reaction time managing feature is also provided with a self-diagnosing function that is capable of determining whether scheduled processes are executable or not during the time set before execution of the processes and informing an operator of the results of determination.

Control device for automatic liquid handling system

In reagent reaction experiments using microplates, the operator cannot just set dispensing tips in all the fixing holes of the dispensing tip container. It is necessary to carry out the time-consuming task of deciding in advance on a suitable arrangement of positions for the dispensing tips. It is also necessary for the operator to carry out the time-consuming task of determining in advance the quantity of reagent used and how the reagent is to be arranged. These problems are solved by providing a control device that includes a dispensing tip arrangement calculator and reagent quantity and arrangement calculator, and that can inform the operator of these results. The dispensing tip arrangement, the reagent quantity used, and the reagent arrangement is calculated from the information set in advance on specific reagent, the quantity of reagent dispensed into one well of the microplate, the range of wells in the microplate into which reagent is dispensed, and the direction of dispensing.

A position of a piston fluid-tightly sliding along an inner surface of a pipette is instantaneously changed by a short distance to jet a portion of a liquid in the pipette through the nozzle of the pipette as a drop. The instantaneously changed position is provided by a motor which is commonly used for moderately changing the position of the piston to taking-in and taking-out the liquid. The instantaneous minute position changing may be provided with a piezoelectric actuator. An attachable nozzle cap having a nozzle-cap nozzle (through hole) of which diameter is smaller than that of the nozzle of the pipette may be used. The portion of the liquid jetted from the pipette may be detected. The instantaneous changing may be repeated to jet a desired amount of said liquid. The short distance may be adjusted in accordance with the desired amount.

Pipetting apparatus and a method of pipetting a liquid

Control method for a link arm mechanism and an automatic centrifugal machine employing this link arm mechanism

An automatic centrifugal machine comprises a handling apparatus for shifting a test specimen from a predetermined position, a rotor equipped with a bucket accommodating the test specimen, a drive motor for rotating the rotor, a chamber surrounding the rotor, and a refrigerator for cooling the chamber, and the automatic centrifugal machine has a height equal to or less than 1,450 mm. A conveyor line, conveying the test specimen, has a height in a range from 750 mm to 850 mm. The handling apparatus of the test specimen is formed by a link arm mechanism including first and second sliders, first and second arms, and a manipulator hand. The manipulator hand is shifted by controlling first and second sliders so as to satisfy the following relationship

Growing community of inventors

Hitachinaka, Japan

Hidetaka Osawa