Damping device for a centrifuge rotor
Abstract
Abstract A DEVICE FOR DAMPING LATERAL VIBRATIONS OF THE ROTOR OF A HIGH-SPEED CENTRIFUGE WHICH IS MOUNTED ON THE UPPER END OF A VERTICAL DRIVE SHAFT AND ROTATABLE WITHIN A CHAMBER ON THE UPPER SIDE OF A CONTAINER WHICH, IN TURN, IS SECURED TO THE TOP OF A STATIONARY FRAME IN WHICH THE DRIVE UNIT FOR THE ROTOR IS RESILIENTLY MOUNTED. THE CONTAINER IS FILLED WITH A DAMPING FLUID AND CONTAINS A DAMPING PLATE WHICH IS CENTRALLY SECURED TO A HUBLIKE BUSHING WHICH PROJECTS FROM THE DRIVE UNIT INTO THE CONTAINER AND FROM WHICH, IN TURN, THE DRIVE SHAFT PROJECTS. THIS DAMPING PLATE IS PROVIDED AT LEST ON ONED SIDE WITH PROJECTIONS WHICH, WHEN THE DAMPING PLATE IS MOVED ESPECIALLY BY LATERAL VIBRATIONS, TEND TO DISPLACE THE DAMPING FLUID WITHIN THE CONTAINER. THESE PROJECTIONS ARE PREFERABLY CYLINDRICAL, EXTENDING FROM THE DAMPING PLATE COAXIALLY TO THE DRIVE SHAFT TOWARD ONE HORIZONTAL WALL OF THE CONTAINER. TO INCREASE THE DAMPING EFFECT, THIS WALL PREFERABLY ALSO CARRIES SIMILAR PROJECTIONS WHICH EXTEND INTO THE GAPS BETWEEN THE ADJACENT PROJECTIONS ON THE DAMPING PLATE AND ARE LATERALLY SPACED THEREFROM.
Inventors
- 👤 Hans Stallmann
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |