Magnetic shield for primary coil of transcutaneous energy transfer device
First Claim
1. A transcutaneous energy transfer device comprising:
- an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device; and
a magnetic shield covering a side of the primary coil opposite the secondary coil, wherein the magnetic shield comprises a plurality of segments of very high permeability material arranged in one or more concentric rings and connected by a porous flexible material.
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Accused Products
Abstract
A transcutaneous energy transfer device is provided which has a magnetic shield covering the primary winding of the device to reduce sensitivity of the device to conducting objects in the vicinity of the coils and to increase the percentage of magnetic field generated by the primary coil which reaches the secondary coil. This shield is preferably larger than the primary coil in all dimensions and is either formed of a high permeability flexible material, for example a low loss magnetic material in a flexible polymer matrix, with perforations formed in the material sufficient to permit ventilation of the patient'"'"'s skin situated under the shield, or the shield may be formed of segments of very high permeability material connected by a flexible, porous mesh material.
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Citations
45 Claims
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1. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device; and
a magnetic shield covering a side of the primary coil opposite the secondary coil, wherein the magnetic shield comprises a plurality of segments of very high permeability material arranged in one or more concentric rings and connected by a porous flexible material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
a drive circuit operationally coupleable to the primary coil;
a connector having a connectable electrical contact element for coupling the primary coil to the drive circuit;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device; and
a magnetic shield covering a side of the primary coil opposite the secondary coil;
wherein the primary coil is operationally decoupled from the drive circuit prior to disconnection of the electrical contact element, and wherein connection of electrical contact element occurs prior to operational coupling of the primary coil to the drive circuit. - View Dependent Claims (14, 15, 16)
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17. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device;
a magnetic shield covering a side of the primary coil opposite the secondary coil; and
a compliant cushion disposed on a side of the primary coil facing the secondary coil;
wherein the cushion is releasably mated to the primary coil. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device;
a magnetic shield covering a side of the primary coil opposite the secondary coil; and
a compliant cushion disposed on a side of the primary coil facing the secondary coil;
wherein the cushion is crenellated.
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33. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device;
a magnetic shield covering a side of the primary coil opposite the secondary coil; and
a compliant cushion disposed on a side of the primary coil facing the secondary coil;
wherein the cushion is ventilated and the shield has a plurality of ventilation perforations formed therein. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42)
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43. A transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied;
an implanted secondary coil configured to be inductively coupled to the primary coil and connected to apply energy to a subcutaneous utilization device;
a magnetic shield covering a side of the primary coil opposite the secondary coil; and
a compliant cushion disposed on a side of the primary coil facing the secondary coil;
wherein the shield is flexible so as to be able to conform to the contours of a patient'"'"'s body. - View Dependent Claims (44, 45)
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Specification