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US 5,705,062 AGranted
Analytical device for separating magnetic microparticles from suspensions
AssigneeHoffmann-La Roche Inc.
InventorRolf Knobel
Life of this patent
Estimating the term…
Abstract
An analytical device separates magnetic microparticles from a suspension. The separating portion of the device contains two permanent magnets between which the reaction vessel containing the suspension is disposed. For the purpose of more rapid, complete separation of the magnetic microparticles, magnets are positioned diametrically opposite one another relative to the reaction vessel. The polar axes of the magnets and the longitudinal axis of the reaction vessel include an acute angle.
Claims15
An analytical device which comprises:
- (a) a reaction vessel having an elongated body with a longitudinal portion, a closed base and a longitudinal axis of symmetry, the reaction vessel containing a suspension of magnetic microparticles in solution, the suspension having a free surface;
- and
- (b) at least one receiving station having means for receiving the reaction vessel and means for separating the magnetic microparticles from the solution when the reaction vessel is received by the receiving station, the means for separating the magnetic microparticles comprising a pair of magnets, each magnet in the pair being diametrically opposite to the other magnet in the pair and arranged so that the longitudinal portion of the reaction vessel when received by the receiving station is located between the magnets, each of the magnets having a polar axis which intersects with the polar axis of the other magnet at a point on the longitudinal axis of the reaction vessel, each of the polar axes forming an acute angle with the longitudinal axis of the reaction vessel.
Dependencies are inferred from the claim text.