Fermenter having a magnetically driven agitator
Abstract
Abstract A MAGNETIC DRIVE ARRANGEMENT FOR FERMENTERS WHEREIN THE SAMPLE OR CULTURE AGITATED MUST BE MAINTAINED FREE OF CONTAMINATION. THE MAGNETIC DRIVE INCLUDES A DRIVEN PLATE AND A DRIVING PLATE. THE MAGNETS ON THE DRIVEN PLATE ARE POLYGONALLY ARRANGED WITH LIKE POLES ADJACENT TO MAXIMIZED FIELD STRENGTH, AND ARE MOUNTED IN A CUP-SHAPED RECEPTACLE, LOCATED AND HELD BY A SIMPLE SPACER PLATE. A COVER PLATE CAPTIVATES THE MAGNETS AND IS JOINED TO THE CUPSHAPED RECEPTICLE TO ISOLATE THEM FROM THE SAMPLE AGITATED. THE ROTATIONAL DRIVE INCLUDES A DOUBLE SHAFT MOTOR WHICH DRIVES THE DRIVING PLATE AT ONE END THROUGH A REDUCTION GEAR DRIVE, WITH THE OTHER END OF THE MOTOR SHAFT DIRECTLY COUPLED TO A TACHOMETER GENERATOR TO PROVIDE ACCURATE SPEED READINGS IN THE LOWER SPEED RANGES.
Inventors
- 👤 Charles E Bender
- 👤 Douglas S Fraser
Bibliographic Details
Claims Analysis
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |