Patents by Inventor Hidetaka Osawa
Hidetaka Osawa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11971339Abstract: A particle size distribution measurement device includes a cell holding body 31 that holds a measurement cell 2 containing a measurement sample and a dispersion medium and a reference cell 6 containing a reference sample and is rotated by a motor 322, and a cell discrimination mechanism 7 that discriminates the cells 2, 6 passing through a predetermined rotation position by using a magnetic force or electrostatic capacitance.Type: GrantFiled: October 29, 2019Date of Patent: April 30, 2024Assignees: Horiba, Ltd., Eppendorf Himac Technologies Co., Ltd.Inventors: Tetsuji Yamaguchi, Hitoshi Watanabe, Hidetaka Osawa, Ken Asakura, Kenichi Nemoto
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Publication number: 20230294113Abstract: A washing liquid distribution element attached to an upper portion of a rotor body includes an upper distribution element and a lower distribution element. A washing liquid is supplied from a washing liquid introduction port during rotation of a rotor and enters a recessed inner portion of the lower distribution element. The washing liquid entered in the inner portion moves from the vicinity of rotation center toward a radially outer side to climb an inclined part by centrifugal force. Washing liquid passages are formed in a radial pattern at a lower annular part at a tip of the inclined part, and the washing liquid is discharged radially outward from discharge ports of the washing liquid passages. Formation of the inclined part makes it possible to evenly distribute the washing liquid into test tubes.Type: ApplicationFiled: June 29, 2021Publication date: September 21, 2023Applicant: Eppendorf Himac Technologies Co., Ltd.Inventors: Ryo Sato, Masayuki Shiina, Hidetaka Osawa, Ken Asakura, Hiroshi Hayasaka
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Publication number: 20220184639Abstract: 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.Type: ApplicationFiled: April 24, 2020Publication date: June 16, 2022Applicant: Eppendorf Himac Technologies Co., Ltd.Inventors: Masayuki Shiina, Hidetaka Osawa, Ken Asakura, Hiroshi Hayasaka
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Publication number: 20220011213Abstract: A particle size distribution measurement device includes a cell holding body 31 that holds a measurement cell 2 containing a measurement sample and a dispersion medium and a reference cell 6 containing a reference sample and is rotated by a motor 322, and a cell discrimination mechanism 7 that discriminates the cells 2, 6 passing through a predetermined rotation position by using a magnetic force or electrostatic capacitance.Type: ApplicationFiled: October 29, 2019Publication date: January 13, 2022Inventors: Tetsuji YAMAGUCHI, Hitoshi WATANABE, Hidetaka OSAWA, Ken ASAKURA, Kenichi NEMOTO
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Patent number: 9981274Abstract: 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.Type: GrantFiled: April 13, 2012Date of Patent: May 29, 2018Assignee: HITACHI KOKI CO., LTD.Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
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Patent number: 9452437Abstract: 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.Type: GrantFiled: November 25, 2011Date of Patent: September 27, 2016Assignee: HITACHI KOKI CO., LTD.Inventors: Hidetaka Osawa, Kousuke Maeno, Hiroyuki Takahashi
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Patent number: 9375730Abstract: 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.Type: GrantFiled: April 13, 2012Date of Patent: June 28, 2016Assignee: HITACHI KOKI CO., LTD.Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
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Publication number: 20140045669Abstract: 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.Type: ApplicationFiled: November 25, 2011Publication date: February 13, 2014Inventors: Hidetaka Osawa, Kousuke Maeno, Hiroyuki Takahashi
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Publication number: 20140031191Abstract: 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.Type: ApplicationFiled: April 13, 2012Publication date: January 30, 2014Applicant: HITACHI KOKI CO., LTD.Inventors: Masahiro Inaniwa, Hiroyuki Takahashi, Kouichi Akatsu, Hisanobu Ooyama, Yuki Hodotsuka, Hidetaka Osawa
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Publication number: 20120260687Abstract: 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.Type: ApplicationFiled: April 13, 2012Publication date: October 18, 2012Applicant: HITACHI KOKI CO., LTD.Inventors: Masahiro INANIWA, Hiroyuki TAKAHASHI, Kouichi AKATSU, Hisanobu OOYAMA, Yuki HODOTSUKA, Hidetaka OSAWA
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Patent number: 7618589Abstract: 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.Type: GrantFiled: April 28, 2005Date of Patent: November 17, 2009Assignee: Hitachi Koki Co., Ltd.Inventors: Hiroatsu Toi, Kenji Yamada, Masataka Morita, Hidetaka Osawa, Tadashi Ohkawara
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Patent number: 7390460Abstract: 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.Type: GrantFiled: November 18, 2003Date of Patent: June 24, 2008Assignee: Hitachi Koki Co., Ltd.Inventors: Hidetaka Osawa, Hiroatsu Toi, Kenji Yamada, Tadashi Ohkawara
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Patent number: 7374720Abstract: 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.Type: GrantFiled: November 18, 2003Date of Patent: May 20, 2008Assignee: Hitachi Koki Co., Ltd.Inventors: Hiroatsu Toi, Hidetaka Osawa, Kenji Yamada, Tadashi Ohkawara
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Publication number: 20060051246Abstract: 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.Type: ApplicationFiled: April 28, 2005Publication date: March 9, 2006Inventors: Hiroatsu Toi, Kenji Yamada, Masataka Morita, Hidetaka Osawa, Tadashi Ohkawara
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Publication number: 20040208795Abstract: In order to eliminate any mistakes regarding attachment or removal of dispensing tips to and from a dispensing head provided in an automatic liquid handling system used for dispensing an object to be examined, reagent, enzymes or the like into wells of a microplate, a dispensing tip sensor is provided to sense if the dispensing tips are attached to the head. The sensor includes a light emitting unit and a light receiving unit which are disposed above and diagonally opposite positions of a disposal container in which used dispensing tips are disposed of. The dispensing head with some dispensing tips attached thereto moves to traverse the light path of the sensor, thereby enabling sensing of the dispensing tips attached to the head.Type: ApplicationFiled: April 16, 2004Publication date: October 21, 2004Inventors: Hiroatsu Toi, Kenji Yamada, Hidetaka Osawa, Tadashi Ohkawara
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Patent number: 6773927Abstract: 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.Type: GrantFiled: February 13, 2001Date of Patent: August 10, 2004Assignee: Hitachi Koki Co., Ltd.Inventors: Hidetaka Osawa, Masahiro Inaniwa, Toyosaku Sato
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Publication number: 20040096365Abstract: 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.Type: ApplicationFiled: November 18, 2003Publication date: May 20, 2004Inventors: Hiroatsu Toi, Hidetaka Osawa, Kenji Yamada, Tadashi Ohkawara
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Publication number: 20040096366Abstract: 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.Type: ApplicationFiled: November 18, 2003Publication date: May 20, 2004Inventors: Hidetaka Osawa, Hiroatsu Toi, Kenji Yamada, Tadashi Ohkawara
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Patent number: 6701219Abstract: 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.Type: GrantFiled: December 1, 2000Date of Patent: March 2, 2004Assignee: Hitachi Koki Co., Ltd.Inventors: Hideki Hoshiba, Masahiro Inaniwa, Hidetaka Osawa, Hiroshi Hayasaka
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Publication number: 20010016358Abstract: 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.Type: ApplicationFiled: February 13, 2001Publication date: August 23, 2001Applicant: HITACHI KOKI CO., LTD.Inventors: Hidetaka Osawa, Masahiro Inaniwa, Toyosaku Sato