US4764164A
Expired / Lapsed
US
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Iontophoresis device
Assignee: Advance Kaihatsu Kenkyujo KK
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Filing: 1985-10-30
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Granted: 1988-08-16
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Expires: 2005-10-30
Abstract
Abstract A device for iontophoresis including an electric source, a pulse generator, a working electrode, and a counter electrode is described. This device has a circuit for discharging the charges accumulated in said electrodes during each intermission period of therapeutic pulses generated by said pulse generator (i.e., a circuit for effecting the depolarization between the above-mentioned both electrodes during each intermission period of therapeutic pulses). This device can be directly and very easily applied to the human skin, without causing undesirable irritation in the skin, especially without causing burns and rubefaction in the skin.
Inventors
- 👤 Minoru Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:00
CPC Classifications
A; A61; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/0404; A61N1/0408; A61N1/0428; A61N1/0432; A61N1/044; A61N1/18; A61N1/32; A61N1/325; A61N1/0436
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
100 words
In an iontophoresis device including an electric power source, a working electrode and a counter electrode, the improvement which comprises: said device having a pulse generator means which is driven by said electric power source for producing a therapeutic pulse voltage of high frequency between said working and counter electrode and a shortcircuiting means for shortcircuiting said working and counter electrodes in an intermission period of said therapeutic pulse voltage for a selected duration to depolarize polarized potentials therebetween to a predetermined low level close to a base line, thereby producing iontophoresis by high frequency pulse current without skin irritations.
Claim 2
Dependent Claim
100 words
In an iontophoresis device including an electric power source, a working electrode and a counter electrode, the improvement which comprises: said device having a pulse generator means which is driven by said electric power source for producing a therapeutic pulse voltage of high frequency between said working and counter electrode and a shortcircuiting means for shortcircuiting said working and counter electrodes in an intermission period of said therapeutic pulse voltage for a selected duration to depolarize polarized potentials therebetween to a predetermined low level close to a base line, thereby producing iontophoresis by high frequency pulse current without skin irritations.
Claim 3
Dependent Claim
13 words
The device of claim 1 which further includes means for controlling output current.
Claim 4
Dependent Claim
26 words
The device of claim 1 which further includes a means for recovering residual charges stored in the skin as a result of the polarization capacity thereof.
Claim 5
Dependent Claim
42 words
The device of claim 3, wherein said means for recovering the residual charges is an inductor for discharging and simultaneously recovering the residual charges of the skin by L-C resonance between the inductance of said inductor and the capacitance of the skin.
Claim 6
Dependent Claim
22 words
The device of claim 1, wherein said therapeutic pulse voltage has a frequency in the range of 1 kHz to 500 kHz.
Claim 7
Dependent Claim
21 words
The device of claim 5, wherein said therapeutic pulse voltage has a duty ratio in the range of 0.1 to 0.7.
Claim 8
Dependent Claim
28 words
The device of claim 6, wherein said shortcircuiting means is designed to depolarize the polarized potentials between said working and counter electrodes to a level less than 3V.
Claim 9
Dependent Claim
18 words
The device of claim 1 which further includes a voltage converter for amplifying voltage from said electric source.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |