Patents by Inventor Yoshitaka Niinai
Yoshitaka Niinai 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: 10252279Abstract: A centrifuge including a rotor, a rotor chamber having an opening, a motor, a door configured to close the opening, an input/output unit configured to receive an input of an operating condition and to display an operating status, and a housing accommodating therein the rotor, the rotor chamber, the motor, the door and the input/output unit, wherein the housing has the opening at an upper surface thereof, wherein a light emitting part having a horizontal width longer than the opening is provided in the vicinity of a corner portion at which the upper surface and a front surface of the housing intersect with each other or in the vicinity of a front side of the opening, and wherein a light emitting form of the light emitting part is configured to be changed depending on the operating status.Type: GrantFiled: December 17, 2014Date of Patent: April 9, 2019Assignee: KOKI HOLDINGS CO., LTD.Inventors: Tadashi Ohkawara, Yoshitaka Niinai, Hiroshi Hayasaka, Takeshi Taniguchi, Hisanobu Ooyama, Hiroyuki Takahashi
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Publication number: 20150174590Abstract: A centrifuge including a rotor, a rotor chamber having an opening, a motor, a door configured to close the opening, an input/output unit configured to receive an input of an operating condition and to display an operating status, and a housing accommodating therein the rotor, the rotor chamber, the motor, the door and the input/output unit, wherein the housing has the opening at an upper surface thereof, wherein a light emitting part having a horizontal width longer than the opening is provided in the vicinity of a corner portion at which the upper surface and a front surface of the housing intersect with each other or in the vicinity of a front side of the opening, and wherein a light emitting form of the light emitting part is configured to be changed depending on the operating status.Type: ApplicationFiled: December 17, 2014Publication date: June 25, 2015Inventors: Tadashi Ohkawara, Yoshitaka Niinai, Hiroshi Hayasaka, Takeshi Taniguchi, Hisanobu Ooyama, Hiroyuki Takahashi
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Patent number: 8262551Abstract: According to an aspect of the invention, a centrifuge includes: a rotor for separating samples; a motor for driving and rotating the rotor; a drive shaft for connecting together the motor and the rotor; a rotation sensor for detecting at least one of the rotation speed of the motor and the rotor; and a displacement sensor for detecting the swinging motion of the rotor or the drive shaft, wherein, after one of speed of the motor and the rotor is accelerated up to previously set rotation speed, when the swinging amount of the rotor or the drive shaft is equal to or more than preset allowable value, the supply of power to the motor is stopped to decelerate the motor, wherein, during the deceleration, signal from the displacement sensor is compared with the preset allowable value, and wherein when the signal from the displacement sensor becomes equal to or less than the preset allowable value, the motor is accelerated.Type: GrantFiled: October 30, 2008Date of Patent: September 11, 2012Assignee: Hitachi Koki Co., Ltd.Inventors: Katsunori Akatsu, Yoshitaka Niinai, Hisanobu Ooyama
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Publication number: 20090170683Abstract: According to an aspect of the invention, a centrifuge includes: a rotor for separating samples; a motor for driving and rotating the rotor; a drive shaft for connecting together the motor and the rotor; a rotation sensor for detecting at least one of the rotation speed of the motor and the rotor; and a displacement sensor for detecting the swinging motion of the rotor or the drive shaft, wherein, after one of speed of the motor and the rotor is accelerated up to previously set rotation speed, when the swinging amount of the rotor or the drive shaft is equal to or more than preset allowable value, the supply of power to the motor is stopped to decelerate the motor, wherein, during the deceleration, signal from the displacement sensor is compared with the preset allowable value, and wherein when the signal from the displacement sensor becomes equal to or less than the preset allowable value, the motor is accelerated.Type: ApplicationFiled: October 30, 2008Publication date: July 2, 2009Inventors: Katsunori AKATSU, Yoshitaka Niinai, Hisanobu Ooyama
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Patent number: 7367932Abstract: A structure in which when a rotating member is broken, an impact force is prevented from being concentrated to a local portion by enabling to receive a debris by a wide area at an instant and breaking energy can further be facilitated to consume. Further, according to a centrifuge attached with a cooler, the problem can be achieved to resolve by utilizing an insulating layer at an outer periphery of an evaporator as a space of deforming a guard cylinder when the rotating member is broken.Type: GrantFiled: June 7, 2005Date of Patent: May 6, 2008Assignee: Hitachi Koki Co., Ltd.Inventor: Yoshitaka Niinai
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Patent number: 7278961Abstract: A centrifugal separator is configured such that a switching unit adapted to be brought into electrical conduction or into electrical nonconduction is electrically connected between a motor housing and a motor-ground connection wire, and that the switching unit is controlled to be brought into nonconduction when a door is closed.Type: GrantFiled: January 9, 2006Date of Patent: October 9, 2007Assignee: Hitachi Koki Co., Ltd.Inventors: Hiroyuki Takahashi, Masahiro Inaniwa, Yoshitaka Niinai
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Patent number: 7255669Abstract: A centrifuge includes a frame, a damper connected to and supported on the frame for isolating vibrations, a drive unit connected to and supported by the damper, a swing-bucket rotor rotated by the drive unit, an accelerometer for detecting when part of the drive unit contacts part of the frame due to vibrations of the drive unit exceeding a predetermined amplitude, and a control unit for controlling the drive unit based on output from the accelerometer. When amplitude of vibrations in the drive unit exceeds a predetermined value, a portion of the drive unit contacts a portion of the frame. The accelerometer detects an impact caused by the contact between the drive unit and the frame. The drive unit is halted when output detected from the accelerometer exceeds a threshold value for detecting imbalances.Type: GrantFiled: October 8, 2004Date of Patent: August 14, 2007Assignee: Hitachi Koki Co., Ltd.Inventors: Takahiro Shimizu, Yoshitaka Niinai, Shoji Kusumoto, Hiroyuki Takahashi
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Patent number: 7108651Abstract: In a centrifugal chamber 9, an elastic rotation shaft 30 and a high-rigidity rotation shaft 34 extend coaxially. When a rotor selected from an angle rotor 17 and a swing rotor 36 which have different sizes and shapes is set in the centrifugal chamber 9, an optimal shaft is connected automatically to the selected rotor. The angle rotor 17 having a low tendency toward mass eccentricity is supported and rotated by the elastic rotation shaft 30 for high-speed rotation. The swing rotor 34 having a high tendency toward mass eccentricity is supported by the high-rigidity shaft 34 for low-speed rotation. Rotation torque is transmitted to the swing rotor 34 from the elastic rotation shaft.Type: GrantFiled: April 19, 2002Date of Patent: September 19, 2006Assignee: Hitachi Koko Co., Ltd.Inventors: Tatsuya Konno, Yoshitaka Niinai, Masahiro Miura, Shoji Kusumoto, Takahiro Shimizu
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Patent number: 7104944Abstract: A centrifugal separator facilitates maintenance with a function that provides the user with useful data for investigating the causes of failures and for preventing their recurrence, such as data needed to determine the appropriate management and replacement frequency of consumable parts. The centrifugal separator also has a storing unit for recording the number of times that the door is opened and closed, operation records of the drive unit by each shaft, and the number of operations performed by operating function, as well as a display unit for displaying the data. The centrifugal separator also includes a function for displaying messages prompting the user to perform maintenance when the aforementioned performance data reach a predetermined value.Type: GrantFiled: November 24, 2004Date of Patent: September 12, 2006Assignee: Hitachi Koki Co., Ltd.Inventors: Takahiro Fujimaki, Yoshitaka Niinai, Hiroyuki Takahashi, Shoji Kusumoto
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Publication number: 20060178253Abstract: A centrifugal separator is configured such that a switching unit adapted to be brought into electrical conduction or into electrical nonconduction is electrically connected between a motor housing and a motor-ground connection wire, and that the switching unit is controlled to be brought into nonconduction when a door is closed.Type: ApplicationFiled: January 9, 2006Publication date: August 10, 2006Inventors: Hiroyuki Takahashi, Masahiro Inaniwa, Yoshitaka Niinai
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Publication number: 20050272587Abstract: A structure in which when a rotating member is broken, an impact force is prevented from being concentrated to a local portion by enabling to receive a debris by a wide area at an instant and breaking energy can further be facilitated to consume. Further, according to a centrifuge attached with a cooler, the problem can be achieved to resolve by utilizing an insulating layer at an outer periphery of an evaporator as a space of deforming a guard cylinder when the rotating member is broken.Type: ApplicationFiled: June 7, 2005Publication date: December 8, 2005Applicant: Hitachi Koki Co., Ltd.Inventor: Yoshitaka Niinai
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Publication number: 20050153823Abstract: A centrifugal separator facilitates maintenance with a function that provides the user with useful data for investigating the causes of failures and for preventing their recurrence, such as data needed to determine the appropriate management and replacement frequency of consumable parts. The centrifugal separator also has a storing unit for recording the number of times that the door is opened and closed, operation records of the drive unit by each shaft, and the number of operations performed by operating function, as well as a display unit for displaying the data. The centrifugal separator also includes a function for displaying messages prompting the user to perform maintenance when the aforementioned performance data reach a predetermined value.Type: ApplicationFiled: November 24, 2004Publication date: July 14, 2005Inventors: Takahiro Fujimaki, Yoshitaka Niinai, Hiroyuki Takahashi, Shoji Kusumoto
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Publication number: 20050079064Abstract: A centrifuge includes a frame, a damper connected to and supported on the frame for isolating vibrations, a drive unit connected to and supported by the damper, a swing-bucket rotor rotated by the drive unit, an accelerometer for detecting when part of the drive unit contacts part of the frame due to vibrations of the drive unit exceeding a predetermined amplitude, and a control unit for controlling the drive unit based on output from the accelerometer. When amplitude of vibrations in the drive unit exceeds a predetermined value, a portion of the drive unit contacts a portion of the frame. The accelerometer detects an impact caused by the contact between the drive unit and the frame. The drive unit is halted when output detected from the accelerometer exceeds a threshold value for detecting imbalances.Type: ApplicationFiled: October 8, 2004Publication date: April 14, 2005Inventors: Takahiro Shimizu, Yoshitaka Niinai, Shoji Kusumoto, Hiroyuki Takahashi
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Patent number: 6764437Abstract: A centrifuge includes a rotor, and a motor for rotating the rotor. At least three identification elements provided on the rotor are arranged along a circumference of a circle whose center coincides with an axis of rotation of the rotor. An angular interval between prescribed two of the at least three identification elements indicates a maximum allowable rotational speed of the rotor. One or more of the at least three identification elements indicates a type of the rotor. A sensor operates for detecting the at least three identification elements during rotation of the rotor. The angular interval between the prescribed two of the at least three identification elements is measured in response to an output signal from the sensor to detect the maximum allowable rotational speed of the rotor. The type of the rotor is detected in response to the output signal from the sensor.Type: GrantFiled: October 4, 2001Date of Patent: July 20, 2004Assignee: Hitachi Koki Co., Ltd.Inventors: Kenichi Tetsu, Masahiro Inaniwa, Yoshitaka Niinai, Hiroyuki Takahashi
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Publication number: 20040138041Abstract: In a centrifugal chamber 9, an elastic rotation shaft 30 and a high-rigidity rotation shaft 34 extend coaxially. When a rotor selected from an angle rotor 17 and a swing rotor 36 which have different sizes and shapes is set in the centrifugal chamber 9, an optimal shaft is connected automatically to the selected rotor. The angle rotor 17 having a low tendency toward mass eccentricity is supported and rotated by the elastic rotation shaft 30 for high-speed rotation. The swing rotor 34 having a high tendency toward mass eccentricity is supported by the high-rigidity shaft 34 for low-speed rotation. Rotation torque is transmitted to the swing rotor 34 from the elastic rotation shaft.Type: ApplicationFiled: March 1, 2004Publication date: July 15, 2004Inventors: Tatsuya Konno, Yoshitaka Niinai, Masahiro Miura, Shoji Kusumoto, Takahiro Shimizu
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Patent number: 6589152Abstract: The rotor data including a model name, a maximum rotating speed, and a rotor identification number of a rotor that is purchased after installation, for example, is stored through the inputting unit in an EEPROM in addition to the rotor data that was stored in the ROM before shipping. The inputted rotor data is displayed on the display in a list image together with the rotor data of the rotor data in the ROM to provide easily selection of the rotor. The inputted rotor data may be displayed with priority to the rotor data in the ROM. The rotor data may further include check data. It may be judged that the inputted rotor data is correctly inputted. If the rotor data is incorrectly inputted, an error message is displayed and the rotary data is not stored. If the rotor data is correctly inputted, the rotary data is registered in the RAM.Type: GrantFiled: April 6, 2001Date of Patent: July 8, 2003Assignee: Hitachi Koki Co., Ltd.Inventors: Katsunori Akatsu, Yoshitaka Niinai, Hisanobu Oyama, Takayuki Watahiki
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Publication number: 20020147095Abstract: The rotor data including a model name, a maximum rotating speed, and a rotor identification number of a rotor that is purchased after installation, for example, is stored through the inputting unit in an EEPROM in addition to the rotor data that was stored in the ROM before shipping. The inputted rotor data is displayed on the display in a list image together with the rotor data of the rotor data in the ROM to provide easily selection of the rotor. The inputted rotor data may be displayed with priority to the rotor data in the ROM. The rotor data may further include check data. It may be judged that the inputted rotor data is correctly inputted. If the rotor data is incorrectly inputted, an error message is displayed and the rotary data is not stored. If the rotor data is correctly inputted, the rotary data is registered in the RAM.Type: ApplicationFiled: April 6, 2001Publication date: October 10, 2002Applicant: HITACHI KOKI CO., LTD.Inventors: Katsunori Akatsu, Yoshitaka Niinai, Hisanobu Oyama, Takayuki Watahiki
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Patent number: 6416455Abstract: A rotor for centrifugal separation of liquid specimens introduced on a microplates or a collective unit of microtubes in form of microplates (box type specimen holder) under centrifugal acceleration. Within the rotor, specimen receptacle are placed in radial direction with respect to the axis of rotation, the box type specimen holder is placed in each of the specimen receptacles, and there is provided a member for preventing the box type specimen holder from falling down, or a pad is arranged between the box type specimen holder and inner wall in parallel to the axis of rotation, and centrifugal force to be applied on the box type specimen holder is received by the pad, which is designed in such shape as to approximately follow the shape of the outer wall, and centrifugal separation can be performed with the specimen receptacle inserted from above.Type: GrantFiled: April 21, 2000Date of Patent: July 9, 2002Assignee: Hirachi Koki Co., Ltd.Inventors: Masaharu Aizawa, Jun Sato, Yoshitaka Niinai
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Publication number: 20020042334Abstract: A centrifuge includes a rotor, and a motor for rotating the rotor. At least three identification elements provided on the rotor are arranged along a circumference of a circle whose center coincides with an axis of rotation of the rotor. An angular interval between prescribed two of the at least three identification elements indicates a maximum allowable rotational speed of the rotor. One or more of the at least three identification elements indicates a type of the rotor. A sensor operates for detecting the at least three identification elements during rotation of the rotor. The angular interval between the prescribed two of the at least three identification elements is measured in response to an output signal from the sensor to detect the maximum allowable rotational speed of the rotor. The type of the rotor is detected in response to the output signal from the sensor.Type: ApplicationFiled: October 4, 2001Publication date: April 11, 2002Applicant: Hitachi Koki Co., Ltd.Inventors: Kenichi Tetsu, Masahiro Inaniwa, Yoshitaka Niinai, Hiroyuki Takahashi
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Patent number: 5738622Abstract: A centrifugal separator comprising: a rotor for containing a sample; a rotating unit; a detection circuit for detecting a distance between a reference position and a position of the rotor and generating a distance detection signal; a rectifying circuit for half-wave rectifying the distance detection signal; a judging circuit for judging the distance detection signal from the rectifying circuit; and a controller for controlling the rotating unit in accordance with a judging result of the judging circuit and a corresponding method are disclosed. The judging circuit judges whether the distance is in a balanced condition of or an unbalance condition of the rotor.Type: GrantFiled: May 22, 1996Date of Patent: April 14, 1998Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshitaka Niinai, Shoji Kusumoto, Tsutomu Takamura, Noriyasu Matsufuji