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US 7,255,669 B2Granted
Centrifuge with imbalance detector
AssigneeHitachi Koki Co., Ltd.
InventorsTakahiro Shimizu, Yoshitaka Niinai, Shoji Kusumoto, Hiroyuki Takahashi
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AssigneeHitachi Koki Co., Ltd.
InventorsTakahiro Shimizu, Yoshitaka Niinai, Shoji Kusumoto, Hiroyuki Takahashi
Estimating the term…
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.
A centrifuge comprising:
A centrifuge comprising:
A centrifuge comprising:
A centrifuge comprising:
A centrifuge comprising:
A centrifuge comprising:
A centrifuge comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Balancing rotary bowls ; Schrappers: imbalance detection devices
Comprising test tubes: pivotably mounted
Centrifuges
Term ended 8 Oct 2024 (estimated)
1. Field of the Invention
The present invention relates to a centrifuge, and more particularly to a centrifuge used for a sample separation.
2. Description of Related Art
The above and other objects, features and advantages of the invention will become more apparent from reading the following description of the preferred embodiments taken in connection with the accompanying drawings in which;
FIG. 1 is a side cross-sectional view showing a centrifuge according to a first embodiment of the present invention;
FIG. 2 is an enlarged cross-sectional view showing an area of the centrifuge near a ring and a portion of a drive unit according to the first embodiment;
A centrifuge according to preferred embodiments of the present invention will be described while referring to the accompanying drawings wherein like parts and components are designated by the same reference numerals to avoid duplicating description.
A centrifuge according to a first embodiment of the present invention will be described with reference to FIGS. 1 through 7, FIG. 1 is a cross-sectional view of a centrifuge 1 according to the first embodiment.
As shown in FIG. 1, the centrifuge 1 includes a frame 6 formed of a plate material or the like that has been bent into a substantially box shape. A chamber 16 is disposed on top of the frame 6 and contains a rotating space 17 therein. The chamber 16 is surrounded by a sound- and heat-insulating material, such as urethane foam 25. A ring 14 is disposed on the frame 6. An opening 20 corresponding to the ring 14 is formed at a central portion of the chamber 16 and fits over an outer periphery of the ring 14 to fix the chamber 16 on the frame 6. By packing the urethane foam 25 around the installation location of the chamber 16, the chamber 16 can be formed integrally with the frame 6. However, the chamber 16 can be fixed to the frame 6 using screws or the like to form the chamber 16 and the frame 6 integrally.