Patents by Inventor Masaharu Aizawa
Masaharu Aizawa 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: 9114407Abstract: A rotor includes a plurality of holding cavities for holding specimen containers, respectively. A transverse cross sectional shape of the holding cavity is a substantially triangular shape having one vertex on an inner circumference side of the rotor. Two vertices of the substantially triangular shape are arranged on an outer circumference side of the rotor so as to have equidistance from a rotary shaft of the rotor. Spacing between sides of the substantially triangular shape in a circumferential direction of the rotor gradually increase over 60% or more a radial length of the holding cavity from an innermost circumferential position to the outer circumference side of the rotor when viewed in its transverse plane.Type: GrantFiled: June 30, 2010Date of Patent: August 25, 2015Assignee: HITACHI KOKI CO., LTD.Inventors: Yoshimitsu Kitazawa, Masaharu Aizawa, Kenichi Nemoto, Jun Sato
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Patent number: 8475351Abstract: The present invention provides a zonal centrifuge which has superior workability and functionality when a sample is filled and extracted. An oil bearing fitted to an outer circumference of a lower tube of a rotor is arranged on an internal face of a bearing housing fixed over a door adapter of the centrifuge. As the oil bearing and the lower tube are lubricated, a vacuum environment in a rotor rotating chamber is maintained. A rotating seal located at an upper leading end of the lower tube of the rotor and a fixing seal facing the rotating seal are arranged and provided in a sealed space formed by a mechanical seal member and the bearing housing, and the fixing seal is so manipulated as to be able to freely join and separate from the rotating seal.Type: GrantFiled: September 21, 2009Date of Patent: July 2, 2013Assignee: Hitachi Koki Co., Ltd.Inventor: Masaharu Aizawa
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Publication number: 20110319247Abstract: A centrifuge sample container includes: a body portion configured to contain a sample; and a cap portion configured to be engaged with and attached on the body portion. The body portion has a substantially triangular external shape defining three apex portions and three side portions between two of the apex portions when viewed from above and has a circular opening portion in an upper portion of the body portion. Distances between centers of the apex portions are equal to one another. Each of the apex portions is formed with a first radius of curvature when viewed from above. Each of the side portions is formed into a outwardly curved arc-like shape with a second radius of curvature when viewed from above.Type: ApplicationFiled: June 24, 2011Publication date: December 29, 2011Applicant: HITACHI KOKI CO., LTD.Inventors: Yoshimitsu KITAZAWA, Masaharu AIZAWA, Kenichi NEMOTO
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Patent number: 7909751Abstract: A centrifugal separator includes a sample line and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: GrantFiled: October 8, 2010Date of Patent: March 22, 2011Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshinori Tobita, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Patent number: 7901342Abstract: A centrifugal separator includes a sample line and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: GrantFiled: June 3, 2009Date of Patent: March 8, 2011Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshinori Tobita, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Publication number: 20110028297Abstract: A centrifugal separator includes a sample line and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: ApplicationFiled: October 8, 2010Publication date: February 3, 2011Applicant: HITACHI KOKI CO., LTD.Inventors: Yoshinori Tobita, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Patent number: 7874973Abstract: According to an aspect of the present invention, there is provided a centrifuge in which a steam sterilization of a sample flow passage is performed, the centrifuge including: a rotor configured to centrifuging a liquid sample; a drive portion that drives and rotates the rotor; a chamber that accommodates the rotor therein, the chamber having a first and a second penetration holes provided on an upper and a bottom portions thereof, respectively; and a first and a second valves disposed on the first and the second penetration holes, respectively; wherein a cooling gas is introduced through one of the first and the second penetration holes and discharged through the other to cool a periphery of the rotor before or after execution of a centrifuging operation of the liquid sample.Type: GrantFiled: May 30, 2008Date of Patent: January 25, 2011Assignee: Hitachi Koki Co., Ltd.Inventors: Katsunori Akatsu, Masaharu Aizawa, Tatsuya Konno
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Publication number: 20100331163Abstract: A rotor includes a plurality of holding cavities for holding specimen containers, respectively. A transverse cross sectional shape of the holding cavity is a substantially triangular shape having one vertex on an inner circumference side of the rotor. Two vertices of the substantially triangular shape are arranged on an outer circumference side of the rotor so as to have equidistance from a rotary shaft of the rotor. Spacing between sides of the substantially triangular shape in a circumferential direction of the rotor gradually increase over 60% or more a radial length of the holding cavity from an innermost circumferential position to the outer circumference side of the rotor when viewed in its transverse plane.Type: ApplicationFiled: June 30, 2010Publication date: December 30, 2010Applicant: HITACHI KOKI CO. LTD.Inventors: Yoshimitsu KITAZAWA, Masaharu AIZAWA, Kenichi NEMOTO, Jun SATO
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Patent number: 7794383Abstract: A centrifugal separator includes a rotator part that separates a liquid sample and has a rotor and a drive part. The rotor receives a liquid sample therein and rotates to separate the liquid sample. The drive part drives the rotor to rotate. A controller part controls operations of the rotator part which is mounted in a rotator casing. A controller casing which is separate from the rotator casing mounts the controller part, and the controller part is connected via a drive wire to the drive part in the rotator part. The rotor casing is disposed at a clean room, the controller casing is disposed outside the clean room, and the drive wire passes through a wall of the clean room via an air-tight sealing mechanism.Type: GrantFiled: June 18, 2008Date of Patent: September 14, 2010Assignee: Hitachi Koki Co., Ltd.Inventors: Kenichi Tetsu, Masaharu Aizawa, Katsunori Akatsu, Yoshinori Tobita, Yukiyoshi Maehara
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Publication number: 20100081553Abstract: The present invention provides a zonal centrifuge which has superior workability and functionality when a sample is filled and extracted. An oil bearing fitted to an outer circumference of a lower tube of a rotor is arranged on an internal face of a bearing housing fixed over a door adapter of the centrifuge. As the oil bearing and the lower tube are lubricated, a vacuum environment in a rotor rotating chamber is maintained. A rotating seal located at an upper leading end of the lower tube of the rotor and a fixing seal facing the rotating seal are arranged and provided in a sealed space formed by a mechanical seal member and the bearing housing, and the fixing seal is so manipulated as to be able to freely join and separate from the rotating seal.Type: ApplicationFiled: September 21, 2009Publication date: April 1, 2010Inventor: Masaharu AIZAWA
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Publication number: 20090239729Abstract: A centrifugal separator includes a sample line and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: ApplicationFiled: June 3, 2009Publication date: September 24, 2009Inventors: Yoshinori TOBITA, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Patent number: 7591775Abstract: A centrifugal separator includes: a sample line; and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes: a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: GrantFiled: July 7, 2005Date of Patent: September 22, 2009Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshinori Tobita, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Publication number: 20080300124Abstract: According to an aspect of the present invention, there is provided a centrifuge in which a steam sterilization of a sample flow passage is performed, the centrifuge including: a rotor configured to centrifuging a liquid sample; a drive portion that drives and rotates the rotor; a chamber that accommodates the rotor therein, the chamber having a first and a second penetration holes provided on an upper and a bottom portions thereof, respectively; and a first and a second valves disposed on the first and the second penetration holes, respectively; wherein a cooling gas is introduced through one of the first and the second penetration holes and discharged through the other to cool a periphery of the rotor before or after execution of a centrifuging operation of the liquid sample.Type: ApplicationFiled: May 30, 2008Publication date: December 4, 2008Inventors: Katsunori AKATSU, Masaharu Aizawa, Tatsuya Konno
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Publication number: 20080251436Abstract: A centrifugal separator includes a rotator part that separates a liquid sample and has a rotor and a drive part. The rotor receives a liquid sample therein and rotates to separate the liquid sample. The drive part drives the rotor to rotate. A controller part controls operations of the rotator part which is mounted in a rotator casing. A controller casing which is separate from the rotator casing mounts the controller part, and the controller part is connected via a drive wire to the drive part in the rotator part. The rotor casing is disposed at a clean room, the controller casing is disposed outside the clean room, and the drive wire passes through a wall of the clean room via an air-tight sealing mechanism.Type: ApplicationFiled: June 18, 2008Publication date: October 16, 2008Inventors: Kenichi Tetsu, Masaharu Aizawa, Katsunori Akatsu, Yoshinori Tobita, Yukiyoshi Maehara
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Patent number: 7396324Abstract: A centrifugal separator includes a rotator part, a controller part, and a first control panel. The rotator part has a rotor for separating components in a liquid sample, and a drive shaft for driving the rotor to rotate. The controller part controls operations of the rotator part. The first control panel is provided with a first operating part for setting operating conditions of the rotator part including the desired rotating speed of the rotor and the desired operation period of time of the rotor, and a first display unit for displaying the operating conditions and status of the rotator part. A second control panel having the same functions as the first control panel is provided in a location separate from the controller part. Hence, a user can check the operating status of the centrifugal separator and set and modify operating conditions for the centrifugal separator not only by using the first control panel but also by using the second control panel.Type: GrantFiled: October 18, 2004Date of Patent: July 8, 2008Assignee: Hitachi Koki Co., Ltd.Inventors: Kenichi Tetsu, Masaharu Aizawa, Katsunori Akatsu, Yoshinori Tobita, Yukiyoshi Maehara
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Patent number: 7214177Abstract: A culture/centrifugal tube includes a tube and a cap. The cap has a disk portion and an annular portion that define an annular groove therebetween. The annular groove opens at a position level with the surface of the disk portion. The open end of the tube extends into the annular groove, with the open end of the vessel in abutment against the surface of the disk portion when the cap is fully engaged on the tube. An angle rotor that is used in a centrifuge is formed with an accommodation hole that receives the culture/centrifugal tube. The accommodation hole including a smaller-diameter tube accommodating portion that accommodates the tube and a larger-diameter cap accommodating portion that accommodates the cap. The cap accommodating portion includes a region that entirely encompasses a corresponding portion of the outer periphery of the annular portion of the cap.Type: GrantFiled: April 25, 2003Date of Patent: May 8, 2007Assignee: Hitachi Koki Co., Ltd.Inventors: Masaharu Aizawa, Masataka Morita
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Patent number: 7144361Abstract: A continuous flow type centrifuge to which a liquid sample is continuous supplied. The centrifuge includes a rotor rotatably supported by a main housing and drivingly rotated by a motor. The rotor includes a cylindrical rotor body, a hollow cylindrical core body, and end plates. The hollow cylindrical core body is disposed in the rotor body providing a space therebetween. The core body has an upper open end, a lower open end and an outer peripheral surface provided with a plurality of partitioning walls positioned at an equal interval in a circumferential direction of the core body for providing a plurality of cavities each defined by the core body, the rotor body and neighboring partitioning walls. The end plates include an upper end plate disposed to cover the upper open end, and a lower end plate disposed to cover the lower open end.Type: GrantFiled: April 28, 2004Date of Patent: December 5, 2006Assignee: Hitachi Koki Co., Ltd.Inventors: Masaharu Aizawa, Yoshinori Tobita
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Publication number: 20060009341Abstract: A centrifugal separator includes: a sample line; and a rotating apparatus portion including a rotor that has a rotor chamber. The centrifugal separator centrifugally separates a sample by supplying the sample from the sample line into the rotor and driving to rotate the rotor in the rotor chamber and discharges the centrifugally separated sample from the rotor via the sample line. The centrifugal separator includes: a sterilizing apparatus for sterilizing at least a portion with which the sample is brought into contact by making a sterilizing fluid flow through the sample line.Type: ApplicationFiled: July 7, 2005Publication date: January 12, 2006Inventors: Yoshinori Tobita, Masaharu Aizawa, Katsunori Akatsu, Tomohiro Koizumi
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Patent number: 6916282Abstract: A bucket consists of a sample container holding member and a metallic member. The sample container holding member is made of a composite material consisting of a reinforcing fiber and a resin. The metallic member has portions engaged with a rotor body.Type: GrantFiled: July 18, 2002Date of Patent: July 12, 2005Assignee: Hitachi Koki Co., Ltd.Inventor: Masaharu Aizawa
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Patent number: D653554Type: GrantFiled: November 25, 2009Date of Patent: February 7, 2012Assignee: Hitachi Koki Co., Ltd.Inventors: Yoshimitsu Kitazawa, Masaharu Aizawa, Kenichi Nemoto, Jun Sato