Transcutaneous energy transfer primary coil with a high aspect ferrite core
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 member centered within the primary coil opposite the secondary coil and formed from a magnetically permeable material.
2 Assignments
0 Petitions
Accused Products
Abstract
Adjustable gastric band implants contain a hollow elastomeric balloon with fixed end points encircling a patient'"'"'s stomach just inferior to the esophago-gastric junction. These balloons can expand and contract through the introduction of saline solution into the balloon. In current bands, this saline solution must be injected into a subcutaneous port with a needle to reach the port located below the skin surface. The port communicates hydraulically with the band via a catheter. As an alternative to using a percutaneously accessed injection port, a system for regulating the flow of saline that is totally implanted may rely upon bi-directionally pumping fluid from an implant device. This system instead transfers AC magnetic flux energy from an external primary coil to a secondary coil that powers the pump in the implanted reservoir. A magnetically permeable rod centered within the primary coil increases power coupled to the secondary coil.
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Citations
13 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 member centered within the primary coil opposite the secondary coil and formed from a magnetically permeable material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. 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 slender cylindrical member centered and longitudinally aligned with a center axis of the primary coil, the member formed from a ferrite material.
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13. A transcutaneous energy transfer device for inductively coupling to an implanted secondary coil connected to apply energy to a subcutaneous utilization device, the transcutaneous energy transfer device comprising:
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an external primary coil to which energy to be transferred is applied; and
a member centered within the primary coil opposite the secondary coil and formed from a magnetically permeable material; and
excitation circuitry operatively configured to selectively energize the external primary coil.
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Specification