Hitachi Koki Co., Ltd.

Eppendorf Himac Technologies Co., Ltd.

Horiba, Ltd.

Kenichi Nemoto

Jun Sato

Masaharu Aizawa

Yoshimitsu Kitazawa

Tetsuji Yamaguchi

Yuki Shimizu

Hiroshi Hayasaka

Shoji Kusumoto

Hidetaka Osawa

Ken Asakura

Hitoshi Watanabe

A centrifuge includes a bucket and a swing rotor. The swing rotor includes a through hole penetrating from an upper to a lower side in an axial direction of the swing rotor and a notch formed in a direction perpendicular to a central axis of the through hole and formed on a radial outer side of the swing rotor. The bucket includes a container. A flange having a seating surface seated in the notch during swinging is formed near the opening of the container, chamfering is performed in parallel on opposing outer surfaces of the container on a bottom side of the container with respect to the seating surface, a cross-section shape of the holding hole inside the container is formed to be elliptical, and a short axis direction of the cross section is arranged parallel to a swing rotation axis direction.

Centrifuge sample container, centrifuge rotor using the same, and centrifuge

A particle size distribution measurement device includes a cell holding bodythat holds a measurement cellcontaining a measurement sample and a dispersion medium and a reference cellcontaining a reference sample and is rotated by a motor, and a cell discrimination mechanismthat discriminates the cellspassing through a predetermined rotation position by using a magnetic force or electrostatic capacitance.

Centrifugal sedimentation-type particle size distribution measurement device

Provided is a centrifuge. In a centrifuge sample container () having a body part () and a bottom part (), the body part () has two parallel flat surfaces, and includes an opening () having an elliptical shape from above view. The bottom part () is formed by a semi-cylindrical part () and quarter spherical parts () connected to the sides of the semi-cylindrical part. A height (H) of the sample container is greater than a length (L) in the short axis direction of the opening, and a curvature radius (R) of the outer surface of an arc part of the elliptical shape, a curvature radius (R) of the outer surface of the semi-cylindrical part, and a curvature radius (R) of the outer surface of the quarter spherical parts are equal. A flange part () that expands radially outward is formed on the opening () of the body part ().

Centrifuge sample container, centrifuge rotor using same, and centrifuge

Provided is a centrifuge. In a centrifuge having a rotor with a rotor body that holds a sample and that is rapidly rotated, an inclined surface that extends upward as it extends radially outward is formed on an upper-side outer peripheral portion of the rotor, in a region that is at a radially outward side and at an upper side of the outer edge of an opening. The inclined surface is a continuous ring-like inclined surface that has the same cross-sectional shape in the circumferential direction and is formed into a straight-line shape or a curved-line shape in cross-section along a rotation central axis. Although winds occur during high-speed rotation of the rotor, the winds are rectified by the inclined surface, and a component force for pressing the rotor body in a downward direction acts thereon.

Centrifuge and centrifuge rotor for suppressing buoyancy

A centrifuge including a lid section of a sample container, the lid section having a rotating shaft for swinging, and a swing-type rotor, and the centrifuge conducts centrifugation operation in a state where the sample container is seated in a bucket housing section by making the sample container in which the rotating shaft is mounted to a rotating shaft engagement groove of the rotor swing due to the rotation of the rotor. The rotating shaft comprises a plurality of members connected by a connection section and is configured so as to be bendable at the connection section by a centrifugal load accompanying the rotation of the rotor.

Centrifuge for pivoting the rotating shafts of the sample container and swing rotor for centrifuge

A centrifuge and a rotor thereof are provided. The centrifuge performs centrifugation in a state where the sample container is swung by rotation and seated in a cutout part of a rotor body. The sample container includes a bucket accommodating a container filled with a sample, and a lid for sealing the bucket and having a rotation shaft. Grooves extending in the longitudinal direction are formed on the outer peripheral surface of the bucket on the bottom side with respect to a seating surface of the bucket. The grooves are arranged at equal intervals in the circumferential direction. Formation of the grooves can prevent increasing the weight of the bucket and realize a highly rigid sample container that can withstand deformation.

Centrifuge with sample bucket having grooves and swing rotor for the same

Provided is a swing rotor for a centrifuge. The centrifuge includes a swing type rotor body having a plurality of holding pins and a plurality of buckets held by the holding pins in a swingable manner. On the rotor body, a connection part is formed to connect two branch arms that diverge from an arm part on an outer peripheral side. A thickness-reduced part penetrating in the same direction as a driving shaft is formed in a region surrounded by the two branch arms on an inner peripheral side of the connection part. Since the branch arms deform accordingly to a certain extent, partial concentration of the stress applied on the holding pins due to a centrifugal load can be alleviated. Thus, the lifespan of the centrifuge can be improved and the centrifugal separation operation can be stabilized.

Swing rotor with holding pins fixed to branch arms and having connection part connecting the branch arms for centrifuge and centrifuge

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.

Centrifugal separator with rotor having plurality of triangular-shaped holding cavities and rotor for use in centrifugal separator

A centrifugal separator comprising: a driving portion; and a swing rotor including, a rotor body, a through-hole passing through the rotor body, pin insert grooves which are provided parallel to the through-hole so as to oppose each other and only partially penetrate the rotor body, and a bucket including, a bucket body that has a contact surface which is configured to contact the rotor body during centrifugal separation, and a cap assembly that seals the bucket body and has a swing shaft extending in a direction perpendicular to an longitudinal direction of the bucket, wherein the swing rotor is rotated when the bucket is inserted into the through-hole, to swing the bucket, and the swing shaft can be moved in the longitudinal direction of the bucket relative to the bucket body and rotated about a longitudinal central axis of the bucket.

Centrifugal separator and swing rotor for centrifugal separator

A swing rotor for a centrifugal separator, the swing rotor including: a hub; and a rotor body disposed around the hub, wherein a plurality of pairs of arms are disposed at the rotor body, wherein a holding pin configured to hold a bucket is disposed to the arm, wherein an engagement portion which is configured to be supported by the holding pin is formed to the bucket, and wherein a sliding surface of the holding pin with an engagement portion of the bucket is formed such that a width of a contact area, which is an area that the holding pin contacts with the engagement portion of the bucket, in an axial direction when the bucket does not swing differs from a width of the contact area in the axial direction when the bucket reaches a horizontal position by swinging during a centrifugal separation operation.

Swing rotor having improved holding pin for centrifugal separator and centrifugal separator including the same

Container

According to an aspect of the invention, there is provided a rotor for a centrifuge which includes an annular portion having a plurality of storing portions each holding a sample vessel that contains a sample to be separated, the annular portion being provided with an end face portion at which holes of the storing portions are opened so as to be aligned in a circumferential direction thereof. Concave portions are disposed each between a corresponding pair of the adjacent holes on the end face portion.

Growing community of inventors

Ibaraki, Japan

Kenichi Nemoto