Patent US6201387B1 successfully refreshed from Google Patents.
US6201387B1
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Miniaturized position sensor having photolithographic coils for tracking a medical probe
Assignee: Biosense Webster Inc
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Filing: 1998-09-24
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Granted: 2001-03-13
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Expires: 2018-09-24
Abstract
Abstract A miniature coil assembly for transmitting or receiving magnetic waves comprises a plurality of coils wherein each coil has a respective axis. The coil assembly is assembled such that at least two of the axes are mutually linearly independent, and such that all of the plurality of coils are contained within a volume having a cross-sectional area less than 1.0 mm 2 . At least two of the coils are photolithographic coils.
Inventors
- 👤 Assaf Govari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:35
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/06; A61B5/065; A61B5/061; A61B5/062; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; G; G01; G01B; G01B7/00; G01B7/003; G01B7/004; G01B7/30; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2073; G01D5/2086; H; H01; H01Q; H01Q7/00; H01Q7/06; H01Q7/08
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
130 words
A miniature coil assembly for transmitting or receiving magnetic waves for tracking a medical probe, the assembly comprising a plurality of coils, each coil having a respective axis, assembled such that at least two of the axes are mutually linearly independent, and such that all of the plurality of coils are contained within a volume having a cross-sectional area less than 1.0 mm 2 , wherein at least two of the coils comprise photolithographic coils having respective, mutually linearly independent axes, the axes of the two photolithographic coils being mutually substantially orthogonal, and a third coil, wherein the axis of the third coil and of the two photolithographic coils are mutually linearly independent, the axis of the third coil being substantially orthogonal to the axes of the two photolithographic coils.
Claim 2
Dependent Claim
130 words
A miniature coil assembly for transmitting or receiving magnetic waves for tracking a medical probe, the assembly comprising a plurality of coils, each coil having a respective axis, assembled such that at least two of the axes are mutually linearly independent, and such that all of the plurality of coils are contained within a volume having a cross-sectional area less than 1.0 mm 2 , wherein at least two of the coils comprise photolithographic coils having respective, mutually linearly independent axes, the axes of the two photolithographic coils being mutually substantially orthogonal, and a third coil, wherein the axis of the third coil and of the two photolithographic coils are mutually linearly independent, the axis of the third coil being substantially orthogonal to the axes of the two photolithographic coils.
Claim 3
Dependent Claim
29 words
The coil assembly of claim 1 , wherein all of the plurality of coils are contained within a volume having a cross-sectional area less than 0.8 mm 2 .
Claim 4
Dependent Claim
29 words
The coil assembly of claim 2 , wherein all of the plurality of coils are contained within a volume having a cross-sectional area less than 0.65 mm 2 .
Claim 5
Dependent Claim
18 words
The coil assembly of claim 1 , wherein the photolithographic coils have a width smaller than 0.8 mm.
Claim 6
Dependent Claim
18 words
The coil assembly of claim 1 , wherein the photolithographic coils have a width smaller than 0.65 mm.
Claim 7
Dependent Claim
15 words
The coil assembly of claim 1 , wherein the third coil is a wire-wound coil.
Claim 8
Dependent Claim
18 words
The coil assembly of claim 1 , wherein the third coil comprises a plurality of interconnected photolithographic circuits.
Claim 9
Dependent Claim
43 words
The coil assembly of claim 1 , wherein the two photolithographic coils comprise elongate rectangular substrates having a long side and a narrow side, and the two photolithographic coils are aligned such that the long sides of the two coils are mutually adjacent.
Claim 10
Dependent Claim
27 words
The coil assembly of claim 8 , wherein the substrates of the two photolithographic coils are aligned substantially at a right angle with respect to one another.
Claim 11
Dependent Claim
23 words
The coil assembly of claim 9 , wherein the assembly is circumscribed by a cylindrical volume having a diameter smaller than 1.1 mm.
Claim 12
Dependent Claim
18 words
The coil assembly of claim 10 , wherein the cylindrical volume has a diameter smaller than 0.9 mm.
Claim 13
Dependent Claim
22 words
The coil assembly of claim 10 , and comprising a ferromagnetic core in said volume for enhancing the inductance of the coils.
Claim 14
Dependent Claim
15 words
The coil assembly of claim 12 , wherein the core comprises an elongate ellipsoidal ferrite.
Claim 15
Dependent Claim
24 words
The coil assembly of claim 13 , wherein the ferrite serves as a common core for substantially all of the coils in the assembly.
Claim 16
Dependent Claim
34 words
The coil assembly of claim 1 , including a position determining system for receiving signals generated by the coils responsive to an electromagnetic field and analyzing the signals to determine coordinates of the coils.
Claim 17
Dependent Claim
23 words
The coil assembly of claim 15 , wherein the coils are inserted in an invasive medical probe, for finding coordinates of the probe.
Claim 18
Dependent Claim
16 words
The coil assembly of claim 16 , wherein the coordinates comprise six-dimensional position and orientation coordinates.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-03-12 | 2004-09-11 | 2005-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-03-12 | 2008-09-11 | 2009-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-03-12 | 2012-09-11 | 2013-03-13 | $7700.00 | Window Closed / Lapsed |