Patent US4706667A successfully refreshed from Google Patents.
US4706667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro surgical high frequency cutting instrument
Assignee: BERCHTOLD MEDIZIN ELEKTRONIK AND CO GmbH
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Filing: 1986-07-28
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Granted: 1987-11-17
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Expires: 2006-07-28
Abstract
Abstract In an electro-surgical r.f. cutting instrument in which the neutral electrode (11) is arranged on both sides of the cutting electrode (12) but is however set back relative to the cutting electrode (12) on the instrument body (13). The ratio of the sizes of the contact areas (14, 15) of the neutral electrode (11) and of the cutting electrode (12) is greater than 7:1 and smaller than 20:1.
Inventors
- 👤 Eberhard Roos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:05
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1402; A61B2018/00571; A61B2018/00577; A61B2018/0091; A61B2018/00916; A61B2018/00928; A61B18/1206; A61B2018/1246; A61B2018/126; A61B18/16; A61B2018/162; A61B90/00; A61B90/06; A61B2090/062
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
An electro-surgical apparatus for connecting to first and second outputs of an electrical generator comprising: a first electrode comprising first and second generally elongate members, the members being spaced apart at one end and being displaceable relative to each other at the other end; a second electrode disposed between the first and second members of the first electrode and beign generally parallel thereto; means for displacing the second electrode relative to the first electrode; means for connecting the first output of the electrical generator to the first and second members of the first electrode and for connecting the second output of the electrical generator to the second electrode when the second electrode is displaced to a first position relative to the first electrode; and means for alternately connecting the first output of the electrical generator to the first member of the first electrode and for connecting the second output of the electrical generator to the second member of the first electrode when the second electrode is displaced to a second position relative to the first electrode.
Claim 2
Dependent Claim
176 words
An electro-surgical apparatus for connecting to first and second outputs of an electrical generator comprising: a first electrode comprising first and second generally elongate members, the members being spaced apart at one end and being displaceable relative to each other at the other end; a second electrode disposed between the first and second members of the first electrode and beign generally parallel thereto; means for displacing the second electrode relative to the first electrode; means for connecting the first output of the electrical generator to the first and second members of the first electrode and for connecting the second output of the electrical generator to the second electrode when the second electrode is displaced to a first position relative to the first electrode; and means for alternately connecting the first output of the electrical generator to the first member of the first electrode and for connecting the second output of the electrical generator to the second member of the first electrode when the second electrode is displaced to a second position relative to the first electrode.
Claim 3
Dependent Claim
58 words
The apparatus according to claim 1 further comprising: means for electrically insulating the members of the first electrode from each other; and means for connecting the first output of the electrical generator to the first member of the first electrode and for connecting the second output of the electrical generator to the second member of the first electrode.
Claim 4
Dependent Claim
67 words
The apparatus according to claim 1 further comprising: means for applying a first voltage to the first and second electrodes when the second electrode is displaced to the first position relative to the first electrode; and means for applying a second voltage to the first and second members of the first electrode when the second electrode is displaced to the second position relative to the first electrode.
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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) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |