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US 8,148,987 B2Granted
Magnetic resonance device
AssigneeSiemens Aktiengesellschaft
InventorMarcel Jan Marie Kruip
Life of this patent
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Abstract
A magnetic resonance device has a cryostat and a gradient coil assembly situated within an inner bore of the cryostat. A seal is positioned between the gradient coil assembly and the inner bore. The seal includes a first fluid filled toroid or helix mounted concentrically with the gradient coils; and a second fluid filled toroid or helix situated within the first toroid, or first helix.
Claims20
A magnetic resonance apparatus comprising:
- a cryostat having an inner bore extending therethrough;
- a gradient coil assembly located within said inner bore of the cryostat;
- a seal between said gradient coil assembly and said inner bore;
- and
- said seal comprising:
- a first toroid mounted concentrically with respect to said gradient coil assembly and defining a first interior volume filled with a first fluid, and
- a second toroid defining a second interior volume filled with a second fluid, wherein said second toroid is disposed within said first fluid filling said first interior volume of said first toroid, and wherein said first toroid and said second toroid are substantially concentric.
4 more elements
A magnetic resonance apparatus comprising:
- a cryostat having an inner bore extending therethrough;
- a gradient coil assembly situated within said inner bore of said cryostat;
- a seal between said gradient coil assembly and said inner bore;
- and
- said seal comprising:
- a first helix mounted concentrically with respect to said gradient coil assembly and defining a first interior volume filled with a first fluid, and
- a second helix defining a second interior volume filled with a second fluid, wherein said second helix is disposed within said first fluid filling said first interior volume of said first helix, and wherein each turn of said first helix is substantially concentric with a corresponding turn of said second helix.
4 more elements
Dependencies are inferred from the claim text.