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Patent US4566183A successfully refreshed from Google Patents.
US4566183A
Expired / Lapsed
US
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Method for making bi-polar electrocautery needle
Assignee: Medtronic Inc
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Filing: 1984-11-15
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Granted: 1986-01-28
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Expires: 2004-11-15
Abstract
Abstract A bi-polar electrocautery needle comprising an inner electrode, an outer electrode and recoverable insulating-locking means for insulating the electrodes from one another and locking them into relative position to one another. And the method of making the bi-polar electrocautery needle in accordance with this invention, the steps including: expanding recoverable dielectric material over an inner electrode; inserting the combination into an outer electrode, and recovering the material between the electrodes for insulating and locking the electrodes into relative position with one another.
Inventors
- 👤 William G. Bloom
- 👤 Gary I. Geschwind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:58
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B2018/00315; A61B2018/00452; A61B2018/00476; A61F; A61F9/00; A61F9/007; A61F9/0079; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49826; Y10T29/49863; Y10T29/49865
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
The method for making a bi-polar electrocautery needle, the steps comprising: providing an inner electrode; stretching insulating-locking means over the inner electrode so as to axially expand and radially reduce the means; placing an outer electrode over the means such that it is concentric with the inner electrode; and recovering the insulating-locking means toward its unstretched condition, so that the means expands radially against both the inner and outer electrodes, locking the electrodes in fixed position relative to one another, spacing apart the electrodes, and electrically insulating the electrodes.
Claim 2
Independent Claim
89 words
The method for making a bi-polar electrocautery needle, the steps comprising: providing an inner electrode; stretching insulating-locking means over the inner electrode so as to axially expand and radially reduce the means; placing an outer electrode over the means such that it is concentric with the inner electrode; and recovering the insulating-locking means toward its unstretched condition, so that the means expands radially against both the inner and outer electrodes, locking the electrodes in fixed position relative to one another, spacing apart the electrodes, and electrically insulating the electrodes.
Claim 3
Independent Claim
95 words
The method of making a bi-polar electrocautery neelde, the steps comprising: providing a wire having an inner conductive member defining an inner electrode and a jacket comprising a heat-recoverable insulating-locking means; gripping the jacket means; axially stretching the means, so as to simultaneously radially compress the means; placing an outer electrode over the wire with the means in the stretched condition; heating the means so as to axially compress and radially expand the means, the means locking the electrodes in place by exerting a radial force against both electrodes and providing insulation to the electrodes.
Claim 4
Independent Claim
95 words
The method of making a bi-polar electrocautery neelde, the steps comprising: providing a wire having an inner conductive member defining an inner electrode and a jacket comprising a heat-recoverable insulating-locking means; gripping the jacket means; axially stretching the means, so as to simultaneously radially compress the means; placing an outer electrode over the wire with the means in the stretched condition; heating the means so as to axially compress and radially expand the means, the means locking the electrodes in place by exerting a radial force against both electrodes and providing insulation to the electrodes.
Claim 5
Dependent Claim
11 words
The method of claim 2 wherein the insulating-locking means is cross-linked.
Claim 6
Dependent Claim
19 words
The method of claim 2 wherein the wire provided includes a jacket comprising a heat-recoverable, cross-linked, pre-expanded insulating-locking means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |