Magnetic gear and centrifuge having a magnetic gear
AssigneeFresenius HemoCare GmbH
InventorArtur Meisberger
Life of this patent
Estimating the term…
Abstract
A magnetic gear having first and second carrier each having a plurality of magnetic poles arranged in a circle and separated by a distance, with the north and south poles arranged in alternation. Flux-carrying connecting pieces are provided on a third carrier to magnetically couple the first and second carriers. A centrifuge for centrifuging biological fluids, especially blood, having such a magnetic gear includes a first carrier in a stationary mount on a frame, while the third carrier is a rotating frame in a rotating mount on the frame. The second carrier is a separation unit mounted on the rotating frame. The centrifuge using the magnetic gear allows maintenance-free operation at a high rpm and with low noise, requiring a relatively low driving power.
Claims15
A magnetic gear magnetically connecting a plurality of carriers rotatable relative to one another, comprising;
- a first carrier and a second carrier;
- a plurality of magnetic poles disposed in a circle on each of the first carrier and the second carrier, with a gap separating adjacent magnetic poles, the plurality of magnetic poles being arranged in an alternating positive pole and negative pole configuration;
- and
- a third carrier having at least two pairs of flux-carrying connecting pieces, wherein said flux-carrying connecting pieces are arranged so that, in a first rotational position of the carriers, a first section of the first pair of flux-carrying connecting pieces faces the gap between two adjacent magnetic poles of the first carrier, and a second section of the first pair of flux-carrying connecting pieces faces the gap between two adjacent magnetic poles of the second carrier, and wherein, in the first rotational position of the carriers, a first section of the second pair of flux-carrying connecting pieces faces a magnetic pole of the first carrier, and a second section of the second pair of flux-carrying connecting pieces faces a magnetic pole of the second carrier.
A centrifuge for separating fluids, comprising:
- a magnetic gear;
- a first carrier and a second carrier magnetically connected by the magnetic gear, the first carrier and the second carrier rotatable relative to each other;
- a plurality of magnetic poles disposed in a circle on each of the first carrier and the second carrier, with a gap separating adjacent magnetic poles, the plurality of magnetic poles being arranged in an alternating positive pole and negative pole configuration;
- and
- a third carrier magnetically connected by the magnetic gear and rotatable relatively to the first carrier and the second carrier, the third carrier having at least two pairs of flux-carrying connecting pieces, wherein said flux-carrying connecting pieces are arranged so that, in a first rotational position of the carriers, a first section of the first pair of flux-carrying connecting pieces faces the gap between two adjacent magnetic poles of the first carrier, and a second section of the first pair of flux-carrying connecting pieces faces the gap between two adjacent magnetic poles of the second carrier, and wherein, in the first rotational position of the carriers, a first section of the second pair of flux-carrying connecting pieces faces a magnetic pole of the first carrier, and a second section of the second pair of flux-carrying connecting pieces faces a magnetic pole of the second carrier.
Dependencies are inferred from the claim text.