Hitachi Koki Co., Ltd.

Hitachi Koko Co., Ltd.

Takahiro Shimizu

Yuki Shimizu

Hiroshi Hayasaka

Yoshitaka Niinai

Shoji Kusumoto

Hiroyuki Takahashi

Masahiro Miura

Tatsuya Konno

A centrifuge includes a frame, a door, a restricting part, a first spring member, and a second spring member. The frame has an opening on top thereof, when the frame is disposed in an orientation in which the frame is intended to be placed. The door is movably supported on the frame to be capable of opening and closing the opening. The restricting part is provided on the frame and defines a prescribed region. The first spring member has one end pivotally supported on the door, and another end pivotally supported on the frame. The second spring member has one end pivotally supported on the door, and another end that is movable within the prescribed region.

Centrifuge having pivotally supported door

A centrifuge includes a frame, a motor, a output shaft, a rotational shaft, and a belt. The frame has a bottom portion. The motor is disposed in the frame to generate a driving force. The output shaft extends from the motor and has an end positioned in proximity to the bottom portion. The rotational shaft is disposed in the frame and has one end positioned in proximity to the bottom portion. The belt is supported on the end of the output shaft and the one end of the rotational shaft. The bottom portion is formed with an opening that opposes at least part of the belt.

Centrifuge assembly portion, centrifuge, having drive arrangement access opening and cover

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.

Centrifuge with imbalance detector

In a centrifugal chamberan elastic rotation shaftand a high-rigidity rotation shaftextend coaxially. When a rotor selected from an angle rotorand a swing rotorwhich have different sizes and shapes is set in the centrifugal chamberan optimal shaft is connected automatically to the selected rotor. The angle rotorhaving a low tendency toward mass eccentricity is supported and rotated by the elastic rotation shaftfor high-speed rotation. The swing rotorhaving a high tendency toward mass eccentricity is supported by the high-rigidity shaftfor low-speed rotation. Rotation torque is transmitted to the swing rotorfrom the elastic rotation shaft.

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Hitachinaka, Japan

Takahiro Shimizu