Patents by Inventor Yoshikazu Wakizaka
Yoshikazu Wakizaka 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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Publication number: 20210205822Abstract: A separation device is a separation device that separates dielectric particles. The separation device includes a flow channel (20), a plurality of three-dimensionally shaped electrodes (31, 32), a power supply (40), and a controller. The flow channel (20) feeds a suspension containing the dielectric particles. The plurality of three-dimensionally shaped electrodes (31, 32) is arranged in the flow channel (20) and extends in a height direction of the flow channel (20). The power supply (40) applies an AC voltage with a predetermined frequency to the plurality of electrodes (31, 32) so as to generate dielectrophoresis of the dielectric particles. The controller controls the power supply.Type: ApplicationFiled: January 31, 2017Publication date: July 8, 2021Inventors: Yoshikazu WAKIZAKA, Massayo TAKANO, Takayuki ITOI, Takaharu ENJOJI, Masakazu TOI, Tomomi NISHIMURA
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Patent number: 10876974Abstract: An inspection device (1) inspects an amount of dielectric particles contained in a sample liquid. The inspection device includes a dielectric collection unit (3), a pump unit (10) and an AC voltage supply unit (11). The dielectric collection unit includes at least one pair of electrodes (41, 42) and a flow channel (13) extending in a predetermined direction on the pair of electrodes. The pump unit is configured to feed the sample liquid to follow the flow channel in the predetermined direction. The AC voltage supply unit is configured to supply, to the pair of electrodes, an AC voltage with a predetermined frequency to cause dielectrophoresis for dielectric particles in the fed sample liquid. The dielectric collection unit includes a plurality of slit regions (Rs) aligned in the predetermined direction between the pair of electrodes. Each of the plurality of slit regions is separated from each other within the flow channel.Type: GrantFiled: October 30, 2019Date of Patent: December 29, 2020Assignee: AFI CORPORATIONInventors: Takaharu Enjoji, Yoshikazu Wakizaka, Satoshi Uchida, Eiko Kato, Masayo Takano
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Patent number: 10766040Abstract: An analysis device (200) analyzes a crossover frequency at which a dielectrophoretic force on dielectric particles switches from a repulsive force to an attractive force or from the attractive force to the repulsive force, comprising a flow channel (5), a pair of electrodes (22, 23), a power supply (24), an imaging unit (25) and an analyzer (26). Through the flow channel (5), a sample solution containing the dielectric particles in the dielectrophoretic liquid flows. The pair of electrodes (22, 23) are arranged in the first channel. The power supply (24) applies a frequency-modulated AC voltage to the first electrodes (22, 23). The imaging unit (25) captures an image of a movement trajectory of each of the dielectric particles flowing between the electrodes (22, 23) in the flow channel. The analyzer (26) obtains the crossover frequency of the dielectric particles based on the captured image of the movement trajectory.Type: GrantFiled: January 27, 2017Date of Patent: September 8, 2020Assignee: AFI CORPORATIONInventors: Yoshikazu Wakizaka, Masayo Takano, Takayuki Itoi, Takaharu Enjoji, Masakazu Toi, Tomomi Nishimura
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Publication number: 20200064274Abstract: An inspection device (1) inspects an amount of dielectric particles contained in a sample liquid. The inspection device includes a dielectric collection unit (3), a pump unit (10) and an AC voltage supply unit (11). The dielectric collection unit includes at least one pair of electrodes (41, 42) and a flow channel (13) extending in a predetermined direction on the pair of electrodes. The pump unit is configured to feed the sample liquid to follow the flow channel in the predetermined direction. The AC voltage supply unit is configured to supply, to the pair of electrodes, an AC voltage with a predetermined frequency to cause dielectrophoresis for dielectric particles in the fed sample liquid. The dielectric collection unit includes a plurality of slit regions (Rs) aligned in the predetermined direction between the pair of electrodes. Each of the plurality of slit regions is separated from each other within the flow channel.Type: ApplicationFiled: October 30, 2019Publication date: February 27, 2020Inventors: Takaharu ENJOJI, Yoshikazu WAKIZAKA, Satoshi UCHIDA, Eiko KATO, Masayo TAKANO
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Patent number: 10495580Abstract: An inspection device (1) inspects an amount of dielectric particles contained in a sample liquid. The inspection device includes a dielectric collection unit (3), a pump unit (10) and an AC voltage supply unit (11). The dielectric collection unit includes at least one pair of electrodes (41, 42) and a flow channel (13) extending in a predetermined direction on the pair of electrodes. The pump unit is configured to feed the sample liquid to follow the flow channel in the predetermined direction. The AC voltage supply unit is configured to supply, to the pair of electrodes, an AC voltage with a predetermined frequency to cause dielectrophoresis for dielectric particles in the fed sample liquid. The dielectric collection unit includes a plurality of slit regions (Rs) aligned in the predetermined direction between the pair of electrodes. Each of the plurality of slit regions is separated from each other within the flow channel.Type: GrantFiled: October 5, 2016Date of Patent: December 3, 2019Assignee: AFI CorporationInventors: Takaharu Enjoji, Yoshikazu Wakizaka, Satoshi Uchida, Eiko Kato, Masayo Takano
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Patent number: 10267696Abstract: A more accurate tension of a belt or a more accurate target natural frequency of the belt when the belt tension is adjusted is determined. A method for calculating a belt tension includes receiving a natural frequency of a belt and a span; performing calculation for determining a tension of the belt using a predetermined expression, based on the natural frequency, the span, and a unit mass of the belt read from a memory; and displaying the tension on a display, wherein in a case where the span is within a predetermined range corresponding to the belt, the predetermined expression is corrected so that an error caused by a bending stiffness of the belt is reduced.Type: GrantFiled: April 29, 2015Date of Patent: April 23, 2019Assignee: BANDO CHEMICAL INDUSTRIES, LTD.Inventors: Hirofumi Miyata, Yoshikazu Wakizaka, Yasushi Chida
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Publication number: 20190032103Abstract: An analysis device (200) analyzes a crossover frequency at which a dielectrophoretic force on dielectric particles switches from a repulsive force to an attractive force or from the attractive force to the repulsive force, comprising a flow channel (5), a pair of electrodes (22, 23), a power supply (24), an imaging unit (25) and an analyzer (26). Through the flow channel (5), a sample solution containing the dielectric particles in the dielectrophoretic liquid flows. The pair of electrodes (22, 23) are arranged in the first channel. The power supply (24) applies a frequency-modulated AC voltage to the first electrodes (22, 23). The imaging unit (25) captures an image of a movement trajectory of each of the dielectric particles flowing between the electrodes (22, 23) in the flow channel. The analyzer (26) obtains the crossover frequency of the dielectric particles based on the captured image of the movement trajectory.Type: ApplicationFiled: January 27, 2017Publication date: January 31, 2019Inventors: Yoshikazu WAKIZAKA, Masayo TAKANO, Takayuki ITOI, Takaharu ENJOJI, Masakazu TOI, Tomomi NISHIMURA
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Publication number: 20180149601Abstract: An inspection device (1) inspects an amount of dielectric particles contained in a sample liquid. The inspection device includes a dielectric collection unit (3), a pump unit (10) and an AC voltage supply unit (11). The dielectric collection unit includes at least one pair of electrodes (41, 42) and a flow channel (13) extending in a predetermined direction on the pair of electrodes. The pump unit is configured to feed the sample liquid to follow the flow channel in the predetermined direction. The AC voltage supply unit is configured to supply, to the pair of electrodes, an AC voltage with a predetermined frequency to cause dielectrophoresis for dielectric particles in the fed sample liquid. The dielectric collection unit includes a plurality of slit regions (Rs) aligned in the predetermined direction between the pair of electrodes. Each of the plurality of slit regions is separated from each other within the flow channel.Type: ApplicationFiled: October 5, 2016Publication date: May 31, 2018Inventors: Takaharu ENJOJI, Yoshikazu WAKIZAKA, Satoshi UCHIDA, Eiko KATO, Masayo TAKANO
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Patent number: 9778098Abstract: A natural-frequency measurement device for measuring the natural frequency of a belt includes: an acceleration sensor attached to a portion of the belt between an adjacent pair of pulleys to sense acceleration resulting from the vibration of the belt; and a measuring instrument configured to measure the natural frequency of the belt based on the acceleration sensed by the acceleration sensor.Type: GrantFiled: May 19, 2015Date of Patent: October 3, 2017Assignee: BANDO CHEMICAL INDUSTRIES, LTD.Inventors: Hirofumi Miyata, Yoshikazu Wakizaka, Yasushi Chida
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Publication number: 20150276522Abstract: The tension of a belt is determined accurately at a low cost. A natural-frequency measurement device is configured to measure, in a belt transmission system including at least two pulleys between which a belt is stretched, the natural frequency of the belt based on a vibration generated by hitting a portion of the belt stretched between two adjacent ones of the at least two pulleys, and includes: an acceleration sensor attached to the portion of the belt to sense acceleration resulting from the vibration of the belt; and a measuring instrument configured to measure the natural frequency of the belt based on the acceleration sensed by the acceleration sensor. The measuring instrument transmits the natural frequency to a belt tension calculator which determines the tension of the belt based on the natural frequency.Type: ApplicationFiled: June 11, 2015Publication date: October 1, 2015Inventors: Hirofumi MIYATA, Yoshikazu WAKIZAKA, Yasushi CHIDA
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Publication number: 20150253181Abstract: A natural-frequency measurement device for measuring the natural frequency of a belt includes: an acceleration sensor attached to a portion of the belt between an adjacent pair of pulleys to sense acceleration resulting from the vibration of the belt; and a measuring instrument configured to measure the natural frequency of the belt based on the acceleration sensed by the acceleration sensor.Type: ApplicationFiled: May 19, 2015Publication date: September 10, 2015Inventors: Hirofumi MIYATA, Yoshikazu WAKIZAKA, Yasushi CHIDA
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Publication number: 20150247769Abstract: A more accurate tension of a belt or a more accurate target natural frequency of the belt when the belt tension is adjusted is determined. A method for calculating a belt tension includes receiving a natural frequency of a belt and a span; performing calculation for determining a tension of the belt using a predetermined expression, based on the natural frequency, the span, and a unit mass of the belt read from a memory; and displaying the tension on a display, wherein in a case where the span is within a predetermined range corresponding to the belt, the predetermined expression is corrected so that an error caused by a bending stiffness of the belt is reduced.Type: ApplicationFiled: April 29, 2015Publication date: September 3, 2015Inventors: Hirofumi Miyata, Yoshikazu Wakizaka, Yasushi Chida