US3801800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isolating switching circuit for an electrosurgical generator
Assignee: Valleylab Inc
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Filing: 1972-12-26
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Granted: 1974-04-02
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Expires: 1992-12-26
Abstract
Abstract An isolating switching circuit suitable for use in an electrosurgical generator to transmit mode information from an electrosurgical instrument to an electrosurgical power generator is disclosed. A selected light emitting diode is energized in accordance with the setting of a mode of operation switch located in the electrosurgical instrument. The light thus emitted impinges on an associated light activated transistor. The thusly activated light activated transistor in turn controls the mode of operation of the electrosurgical power generator so that the desired cutting or coagulating R.F. potential is generated. Alternatively no light emitting diode is energized and the electrosurgical generator idles.
Inventors
- 👤 D Newton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:03
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/12; A61B18/1206; A61B18/1233; A61B2018/00636; A61B2018/0066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
In an electrosurgical apparatus having an electrosurgical power generator and an electrosurgical instrument, an isolating switching circuit to transmit mode information from said electrosurgical instrument to said electrosurgical power generator, said isolating switching circuit comprising: a control device mounted in said electrosurgical instrument; light emitting means for selectively emitting at least one light beam, said light emitting means connected to said control device so as to be activated by said control device; light sensing means for sensing said at least one light beam generated by said light emitting means and for generating a control voltage in accordance therewith; and, control means connected to said light sensing means for controlling the operation of said electrosurgical power generator in a manner determined by the light sensed by said light sensing means.
Claim 2
Dependent Claim
129 words
In an electrosurgical apparatus having an electrosurgical power generator and an electrosurgical instrument, an isolating switching circuit to transmit mode information from said electrosurgical instrument to said electrosurgical power generator, said isolating switching circuit comprising: a control device mounted in said electrosurgical instrument; light emitting means for selectively emitting at least one light beam, said light emitting means connected to said control device so as to be activated by said control device; light sensing means for sensing said at least one light beam generated by said light emitting means and for generating a control voltage in accordance therewith; and, control means connected to said light sensing means for controlling the operation of said electrosurgical power generator in a manner determined by the light sensed by said light sensing means.
Claim 3
Dependent Claim
45 words
An isolating switching circuit as claimed in claim 1 wherein said control device comprises a switch located in said electrosurgical instrument, and wherein said light emitting means comprises first and second light emitting diodes selectively energized in accordance with the operation of said control device.
Claim 4
Dependent Claim
28 words
An isolating switching circuit as claimed in claim 2 wherein said light sensing means includes first and second light activated transistors selectively energized by said light emitting diodes.
Claim 5
Dependent Claim
37 words
An isolating switching circuit as claimed in claim 3 wherein said light emitting means also includes a DC-to-DC converter connected so as to energize said light emitting diodes in accordance with the operation of said control device.
Claim 6
Dependent Claim
55 words
An isolating switching circuit as claimed in claim 4 wherein said switch is a single pole double throw switch connected so that one of said light emitting diodes is energized when said switch is in one position and the other of said light emitting diodes is energized when said switch is in the other position.
Claim 7
Dependent Claim
25 words
An isolating switching circuit as claimed in claim 5 wherein said control means comprises first and second relays selectively operated by said light activated transistors.
References Cited (Backward Citations)
US3413480A
Cited
US3699967A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |