Agitating – Stirrer within stationary mixing chamber – Magnetic stirrer
Patent
1989-05-04
1990-03-27
Jenkins, Robert W.
Agitating
Stirrer within stationary mixing chamber
Magnetic stirrer
B01F 1308
Patent
active
049115553
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 position or elevation of stirring magnets in the respective samples.
REFERENCES:
patent: 3088716 (1961-05-01), Stott
patent: 3356346 (1967-12-01), Landsberger
patent: 3384353 (1968-05-01), Worth
patent: 3614959 (1971-10-01), Schollmaier
patent: 4140401 (1979-02-01), Paschal
patent: 4477192 (1984-10-01), Bonney
patent: 4836826 (1989-06-01), Carter
Profenno Louis A.
Saffer Jeffrey D.
Jenkins Robert W.
Kane, Jr. Daniel H.
The Jackson Laboratory
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