Magnetic stirrer for multiple samples
US4911555A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1989 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01F33/452
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A magnetic stirrer provides controlled and uniform stirring of multiple samples in multiple sample containers containing a stirring magnet. An elongate armature of nonmagnetic material is mounted for rotation on a substantially vertical axis. A motor rotates the elongate armature. First and second drive magnets are mounted at opposite ends of the elongate arms. The drive magnets are oriented with the respective magnetic pole axes in opposite substantially vertical directions. The drive magnets describe a circumference of a circle in a plane upon rotation of the armature. Multiple samples in multiple sample containers are placed at locations spaced from the plane, either above or below, and offset from the circumference of the circle, either outside or inside, for uniform and controlled rotation of the stirring magnets contained in the sample containers. In an alternative embodiment, vertical stems are mounted at the ends of the elongate arm. Drive magnets are mounted on the stems with magnetic pole axes in opposite substantially horizontal radial directions. The stems, drive magnets and multiple samples are adjustable to different height positions for controlling the height positio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.