Magnetic stirrer apparatus with improved stirring action
US4759635A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Sep 4, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F33/4534
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A stirrer apparatus for stirring culture medium has a flask with a lid, a floating magnetic stirrer responsive to a moving magnetic field, and a moving field generator including poles and coils. A guide system is provided for the stirrer including a rod which extend upwardly from the stirrer and a tube which extends through the lid, the rod extending into and being rotatable in the tube; the tube has a closed upper end. A stirrer apparatus having a floating magnetic stirrer with a central, downwardly extending, closed end guide tube, and lid with a guide rod extending into the guide tube. The stirrer included one or more continuous impellers extending across the rotational axis of the stirrer; in one embodiment, the impeller is provided by a bar magnet or magnets beneath a float and in another embodiment a bar magnet is within the float, and the impeller is a continuous blade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.