Patents by Inventor Tsutomu Okoba
Tsutomu Okoba 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: 11828737Abstract: In a preparative liquid chromatograph, a control device for controlling at least operation of a sample injection part includes a holding part for holding a chromatogram-for-setting created in advance for a sample to be analyzed, and an injection program creating part configured to create an injection program that defines timings at which injection operations are executed based on the chromatogram-for-setting, so that, in the case where the number of injections in a multiple injection mode is set, a peak of a chromatogram of the sample to be analyzed injected in each injection operation does not overlap a peak of a chromatogram of the sample to be analyzed injected in another injection operation.Type: GrantFiled: April 5, 2017Date of Patent: November 28, 2023Assignee: Shimadzu CorporationInventors: Soichiro Tamaoki, Tsutomu Okoba, Takayuki Iriki, Shiori Ueda
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Patent number: 11782034Abstract: A fraction collector control device includes a peak designation part that displays a chromatogram for setting and requires a user to select at least one peak in the chromatogram for setting, a parameter extraction part that extracts, as a parameter, a signal level and/or a slope at a start point and an end point of each peak designated by a user, and a threshold candidate generation part that generates, based on the parameter extracted by the parameter extraction part, a threshold candidate usable as a common threshold for detecting start points of all peaks designated by a user and a common threshold for detecting end points of all peaks designated by a user.Type: GrantFiled: March 7, 2017Date of Patent: October 10, 2023Assignee: Shimadzu CorporationInventors: Soichiro Tamaoki, Tsutomu Okoba, Takayuki Iriki, Shiori Ueda
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Patent number: 11733215Abstract: In a preparative liquid chromatograph, a control device for controlling at least operation of a sample injection part includes a holding part for holding a chromatogram-for-setting created in advance for a sample to be analyzed, and an injection program creating part configured to create an injection program that defines timings at which injection operations are executed based on the chromatogram-for-setting, so that, in the case where the number of injections in a multiple injection mode is set, a peak of a chromatogram of the sample to be analyzed injected in each injection operation does not overlap a peak of a chromatogram of the sample to be analyzed injected in another injection operation.Type: GrantFiled: April 5, 2017Date of Patent: August 22, 2023Assignee: Shimadzu CorporationInventors: Soichiro Tamaoki, Tsutomu Okoba, Takayuki Iriki, Shiori Ueda
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Publication number: 20220128520Abstract: In a sucking operation, predetermined amount of a sample is sucked by using a needle from a sample container in which the sample to be analyzed is contained. A sensor circuit, which is electrically conducted to the needle, outputs different levels of signals when a tip of the needle is in contact with liquid and when the tip of the needle is not in contact with liquid. A liquid-contacting detector detects whether the tip of the needle is in air or in liquid by comparing a sensor signal value obtained from a signal output from the sensor circuit during the sucking operation with a preset threshold value. An empty container determiner determines that the sample container is empty when the liquid-contacting determiner detects a change during the sucking operation that the tip of the needle is changed from being in liquid to being in air.Type: ApplicationFiled: January 17, 2019Publication date: April 28, 2022Inventors: Tsutomu OKOBA, Shohei SATO
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Publication number: 20200240966Abstract: A fraction collector control device includes a peak designation part that displays a chromatogram for setting and requires a user to select at least one peak in the chromatogram for setting, a parameter extraction part that extracts, as a parameter, a signal level and/or a slope at a start point and an end point of each peak designated by a user, and a threshold candidate generation part that generates, based on the parameter extracted by the parameter extraction part, a threshold candidate usable as a common threshold for detecting start points of all peaks designated by a user and a common threshold for detecting end points of all peaks designated by a user.Type: ApplicationFiled: March 7, 2017Publication date: July 30, 2020Inventors: Soichiro TAMAOKI, Tsutomu OKOBA, Takayuki IRIKI, Shiori UEDA
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Publication number: 20200064315Abstract: A fraction collector controller includes a threshold storing part, a peak detecting part, a number-of-points-of-data setting part, and a control part. The peak detecting part retrieves, at regular intervals, signals that are from a detector of a liquid chromatograph and are used as points of data, and detects a start point and an end point of a peak by comparing a signal strength and/or an inclination of each of the points of data with the threshold(s). The number-of-points-of-data setting part is configured to set a number of the points of data with which the peak detecting part compares the threshold(s) to detect a start point and an end point of a peak.Type: ApplicationFiled: March 7, 2017Publication date: February 27, 2020Applicant: Shimadzu CorporationInventors: Soichiro TAMAOKI, Tsutomu OKOBA, Takayuki IRIKI, Shiori UEDA
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Publication number: 20200033303Abstract: In a preparative liquid chromatograph, a control device for controlling at least operation of a sample injection part includes a holding part for holding a chromatogram-for-setting created in advance for a sample to be analyzed, and an injection program creating part configured to create an injection program that defines timings at which injection operations are executed based on the chromatogram-for-setting, so that, in the case where the number of injections in a multiple injection mode is set, a peak of a chromatogram of the sample to be analyzed injected in each injection operation does not overlap a peak of a chromatogram of the sample to be analyzed injected in another injection operation.Type: ApplicationFiled: April 5, 2017Publication date: January 30, 2020Inventors: Soichiro TAMAOKI, Tsutomu OKOBA, Takayuki IRIKI, Shiori UEDA
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Patent number: 10473633Abstract: Provided is a preparative separation chromatograph including: a chromatograph 10 having a detector 15; a fraction collector 20; a controller 34 for commanding the fraction collector to initiate a component-collecting operation with reference to a point when the rate of change in an output signal from the detector 15 exceeds a positive reference value and to discontinue the operation with reference to a point when the absolute value of the rate of change becomes smaller than that of a negative reference value after the rate of change turns negative; a storage section 31 for storing sampling-rate information which relates the value of the output signal to the time interval at which the controller determines the rate of change; and a sampling rate determiner 33 for determining the time interval for calculating the rate of change based on the sampling-rate information and actual values of the output signal.Type: GrantFiled: April 1, 2016Date of Patent: November 12, 2019Assignee: SHIMADZU CORPORATIONInventors: Tsutomu Okoba, Takayuki Iriki
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Patent number: 10391424Abstract: A moving section that moves in the horizontal plane direction at above a collection container section where collection containers are set is provided with a nozzle holding section for holding a nozzle, and a waste port holding section for holding a waste port. The moving section is capable of moving the nozzle holding section or the waste port holding section. Accordingly, one of a state where the waste port is at a position immediately below the tip of the nozzle and a state where the waste port is not at the position immediately below the tip of the nozzle may be achieved.Type: GrantFiled: March 17, 2016Date of Patent: August 27, 2019Assignee: SHIMADZU CORPORATIONInventors: Tsutomu Okoba, Takayuki Iriki
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Patent number: 9638674Abstract: An autosampler includes a flow path switching valve to which a sample push unit and an analysis flow path are connected, a sample loop connected to the flow path switching valve, a sampling needle connected to the flow path switching valve, a metering pump connected to the flow path switching valve, and a control unit for controlling operations of the flow path switching valve and the metering pump. The control unit includes an injection volume addition unit for adding up injection volume of a same sample component injected into the sample loop.Type: GrantFiled: January 15, 2014Date of Patent: May 2, 2017Assignee: SHIMADZU CORPORATIONInventors: Tsuyoshi Morikawa, Tsutomu Okoba
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Publication number: 20160288016Abstract: A moving section that moves in the horizontal plane direction at above a collection container section where collection containers are set is provided with a nozzle holding section for holding a nozzle, and a waste port holding section for holding a waste port. The moving section is capable of moving the nozzle holding section or the waste port holding section. Accordingly, one of a state where the waste port is at a position immediately below the tip of the nozzle and a state where the waste port is not at the position immediately below the tip of the nozzle may be achieved.Type: ApplicationFiled: March 17, 2016Publication date: October 6, 2016Applicant: SHIMADZU CORPORATIONInventors: Tsutomu Okoba, Takayuki Iriki
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Publication number: 20160290976Abstract: Provided is a preparative separation chromatograph including: a chromatograph 10 having a detector 15; a fraction collector 20; a controller 34 for commanding the fraction collector to initiate a component-collecting operation with reference to a point when the rate of change in an output signal from the detector 15 exceeds a positive reference value and to discontinue the operation with reference to a point when the absolute value of the rate of change becomes smaller than that of a negative reference value after the rate of change turns negative; a storage section 31 for storing sampling-rate information which relates the value of the output signal to the time interval at which the controller determines the rate of change; and a sampling rate determiner 33 for determining the time interval for calculating the rate of change based on the sampling-rate information and actual values of the output signal.Type: ApplicationFiled: April 1, 2016Publication date: October 6, 2016Applicant: SHIMADZU CORPORATIONInventors: Tsutomu OKOBA, Takayuki IRIKI
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Publication number: 20150377843Abstract: An autosampler includes a flow path switching valve to which a sample push unit and an analysis flow path are connected, a sample loop connected to the flow path switching valve, a sampling needle connected to the flow path switching valve, a metering pump connected to the flow path switching valve, and a control unit for controlling operations of the flow path switching valve and the metering pump. The control unit includes an injection volume addition unit for adding up injection volume of a same sample component injected into the sample loop.Type: ApplicationFiled: January 15, 2014Publication date: December 31, 2015Applicant: SHIMADZU CORPORATIONInventors: Tsuyoshi Morikawa, Tsutomu Okoba
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Patent number: 9086397Abstract: A weight sensor for measuring the weight of a sample container is fixed to a sample container placing portion. The amount of sample contained in the sample container placed in the sample container placing portion is determined based on a measurement value by the weight sensor. A change in amount of sample contained in the sample container is determined before and after sample suction by a sample suction mechanism. The amount of sample actually suctioned from the sample container is determined based on the change.Type: GrantFiled: January 2, 2013Date of Patent: July 21, 2015Assignee: SHIMADZU CORPORATIONInventor: Tsutomu Okoba
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Publication number: 20140182396Abstract: A weight sensor for measuring the weight of a sample container is fixed to a sample container placing portion. The amount of sample contained in the sample container placed in the sample container placing portion is determined based on a measurement value by the weight sensor. A change in amount of sample contained in the sample container is determined before and after sample suction by a sample suction mechanism. The amount of sample actually suctioned from the sample container is determined based on the change.Type: ApplicationFiled: January 2, 2013Publication date: July 3, 2014Applicant: SHIMADZU CORPORATIONInventor: Tsutomu Okoba