Ultraclean magnetic mixer

Details Ultraclean magnetic mixer Ultraclean magnetic mixer

2008-07-08

2008-07-08

Sorkin, David L (Department: 1797)

Agitating

Stirrer within stationary mixing chamber

Magnetic stirrer

Reexamination Certificate

active

07396153

ABSTRACT:
In a magnetically-coupled liquid mixer of the type having a drive mount secured to and extending into a mixing vessel, an external first magnet array adjacent to the drive mount, a stub shaft extending from the drive mount into the vessel and having a first thrust bearing surface, and a driven portion rotatably-mounted on the stub shaft and having a second thrust bearing surface and a second magnet array, the improvement wherein the first and second arrays are positioned with respect to one another such that the first and second thrust bearing surfaces are spaced apart at least in the absence of above-threshold fluid dynamic thrust forces on the driven portion.

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