MINIATURE RESONATING MARKER ASSEMBLY
2 Assignments
0 Petitions
Accused Products
Abstract
A miniature resonating marker assembly that includes, in one embodiment, a ferromagnetic core, a wire coil disposed around the core, and a capacitor connected to the wire coil adjacent to the magnetic core. The core, coil, and capacitor form a signal element that, when energized, generates a magnetic field at a selected resonant frequency. The magnetic field has a magnetic center point positioned along at least one axis of the signal element. An inert encapsulation member encapsulates the signal element therein and defines a geometric shape of the resonating marker assembly. The geometric shape has a geometric center point substantially coincident with the magnetic center point along at least a first axis of the signal element. The shape and configuration of the assembly also provides for a miniature signal element specifically tuned to resonate at a selected frequency with a high quality factor.
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Citations
28 Claims
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1-22. -22. (canceled)
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23. A tunable, resonating marker assembly, comprising:
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a wire coil defining an interior area; a capacitor connected to the wire coil to form an electrical circuit; and a ferromagnetic core having first and second segments each extending at least partially into the interior area of the coil, the first and second segments being axially movable relative to each other and to the coil for tuning the marker assembly to a selected resonant frequency.
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24-26. -26. (canceled)
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27. A resonating marker assembly, comprising:
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an elongated core having an I-shaped cross-sectional area defined by a central web portion intermediate a pair of flange portions connected to the central web portion; a wire coil disposed around the central web portion between the flange portions of the core; a capacitor connected to the wire coil adjacent to the core to form a signal element that generates a magnetic field with a selected resonant frequency in response to a specific stimulus; and an inert encapsulation member encapsulating the signal element forming an inert implantable, activatable marker assembly.
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28-39. -39. (canceled)
Specification