US4123664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ozone generating apparatus
Assignee: Mitsubishi Electric Corp
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Filing: 1977-04-20
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Granted: 1978-10-31
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Expires: 1997-04-20
Abstract
Abstract An ozone generating apparatus comprises a rectangular waveform current feeding device for feeding rectangular waveform alternating current between discharge electrodes of a discharge tube of an ozone generator so that a constant current is fed by the rectangular waveform current feeding device during a half cycle period to the ozone generator which is equivalent to a capacitor. Accordingly, the voltage applied to the ozone generator has a waveform which changes in proportion to the time period. Such a voltage waveform is ideal for the ozone generator to improve the conventional ozone generating apparatus.
Inventors
- 👤 Takashi Yamamura
- 👤 Norikazu Tabata
- 👤 Yoshihiko Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:46
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/087; B01J19/088; C; C01; C01B; C01B13/00; C01B13/10; C01B13/11; C01B13/115; H; H02; H02M; H02M5/00; H02M5/40; H02M5/42; H02M5/44; H02M5/443; H02M5/45; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
An ozone generating apparatus comprising: an ozone generator having a discharge tube with discharge electrodes, and a rectangular waveform current feeding device for feeding rectangular waveform current through the discharge electrodes of the discharge tube without a capacitive coupling circuit between the discharge electrodes and the rectangular waveform current feeding device for driving the ozone generator.
Claim 2
Dependent Claim
56 words
An ozone generating apparatus comprising: an ozone generator having a discharge tube with discharge electrodes, and a rectangular waveform current feeding device for feeding rectangular waveform current through the discharge electrodes of the discharge tube without a capacitive coupling circuit between the discharge electrodes and the rectangular waveform current feeding device for driving the ozone generator.
Claim 3
Dependent Claim
60 words
The ozone generating apparatus according to claim 1 wherein the rectangular waveform current feeding device is a current type inverter comprising a forward converter for obtaining direct current from an alternating current power source, a reverse converter for reversely converting the resulting direct current to alternating current and a DC reactor connected between the forward converter and the reverse converter.
Claim 4
Dependent Claim
22 words
The ozone generating apparatus according to claim 2 wherein the reverse converter is of the atic type using one or more thyristors.
Claim 5
Dependent Claim
22 words
The ozone generating apparatus according to claim 2 wherein the forward converter is of the static type using one or more thyristors.
Claim 6
Dependent Claim
51 words
The ozone generating apparatus according to claim 2 wherein the reverse converter comprises one or more switching elements and further comprises a starting circuit for applying the engery for commutation of the switching elements of the reverse converter to the ozone generator at the time the ozone generating apparatus is started.
Claim 7
Dependent Claim
132 words
An ozone generating apparatus comprising a forward converter having first and second outputs for obtaining direct current from an alternating current power source, a DC reactor connected to the first output of the forward converter, a pair of switching elements each having first and second terminals, the first terminals of the switching elements being connected to the second output of the forward converter and the second terminals of the switching elements having a primary winding of a transformer connected therebetween, a middle tap of the primary winding of the transformer being connected to the DC reactor, an ozone generator having a discharge tube connected to the secondary winding of the transformer to receive a rectangular waveform current as the pair of switching elements are alternately turned on in a constant cycle period.
Claim 8
Dependent Claim
132 words
An ozone generating apparatus comprising a forward converter having first and second outputs for obtaining direct current from an alternating current power source, a DC reactor connected to the first output of the forward converter, a pair of switching elements each having first and second terminals, the first terminals of the switching elements being connected to the second output of the forward converter and the second terminals of the switching elements having a primary winding of a transformer connected therebetween, a middle tap of the primary winding of the transformer being connected to the DC reactor, an ozone generator having a discharge tube connected to the secondary winding of the transformer to receive a rectangular waveform current as the pair of switching elements are alternately turned on in a constant cycle period.
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) | 1981-10-30 | 1982-05-01 | 1982-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-30 | 1986-05-01 | 1986-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-30 | 1990-05-01 | 1990-10-31 | $7700.00 | Window Closed / Lapsed |