Patent US4650648A successfully refreshed from Google Patents.
US4650648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ozone generator with a ceramic-based dielectric
Assignee: Degremont Technologies AG
•
Filing: 1985-09-26
•
Granted: 1987-03-17
•
Expires: 2005-09-26
Abstract
Abstract In modern ozone generators high power densities can be achieved using ceramic-based dielectrics and suitable gap widths and double cooling. By constructing the dielectric layer from dielectric powders of different grain size and binding with artificial resin, the long-term breakdown voltage of the dielectric layer can be increased to such an extent that they fulfil the operating requirements.
Inventors
- 👤 Hans-Rudolf Beer
- 👤 Helmut Britsch
- 👤 Michael Hirth
- 👤 Tony Kaiser
- 👤 Ulrich Kogelschatz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:14
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/40; C; C01; C01B; C01B13/00; C01B13/10; C01B13/11; H01T; H01T19/00; C01B2201/00; C01B2201/30; C01B2201/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
118 words
An ozone generator having a first and a second metallic electrode with said second metallic electrode having a dielectric layer of 1-5 mm thickness on the surface thereof facing said first electrode, and wherein said dielectric layer comprises a hardenable plastic material filled with a dielectric powder, and wherein said plastic material comprises at most 40% by weight of said dielectric layer, and said dielectric powder, consisting essentially of: (a) a barium titanate ceramic powder having a grain size of smaller than 1 μm; and (b) a coarser-grain dielectric component selected from the group consisting of titanium dioxide having a grain size of 5-100 μm and glass pellets and corundum each having a grain size of 50-150 μm.
Claim 2
Dependent Claim
118 words
An ozone generator having a first and a second metallic electrode with said second metallic electrode having a dielectric layer of 1-5 mm thickness on the surface thereof facing said first electrode, and wherein said dielectric layer comprises a hardenable plastic material filled with a dielectric powder, and wherein said plastic material comprises at most 40% by weight of said dielectric layer, and said dielectric powder, consisting essentially of: (a) a barium titanate ceramic powder having a grain size of smaller than 1 μm; and (b) a coarser-grain dielectric component selected from the group consisting of titanium dioxide having a grain size of 5-100 μm and glass pellets and corundum each having a grain size of 50-150 μm.
Claim 3
Dependent Claim
25 words
The ozone generator according to claim 1, wherein the coarser-grain dielectric component is TiO 2 grains which are obtained by crushing sintered TiO 2 .
Claim 4
Dependent Claim
18 words
The ozone generator according to claim 1, wherein anhydride-hardened epoxy resin is used as the hardenable plastic material.
Claim 5
Dependent Claim
19 words
The ozone generator according to claim 1, wherein the dielectric is applied by vacuum casting to the second electrode.
Claim 6
Dependent Claim
21 words
The ozone generator according to claim 1, wherein the dielectric is applied by the pressurized gelling process to the second electrode.
Claim 7
Dependent Claim
20 words
The ozone generator according to claim 1, wherein the dielectric is applied by the displacement method to the second electrode.
Claim 8
Dependent Claim
17 words
The ozone generator according to claim 1, wherein said dielectric layer has a thickness of 2.5-3 mm.
Claim 9
Dependent Claim
22 words
The ozone generator according to claim 1, wherein said barium titanate powder has a relative dielectric constant, ε r , of 2,000.
Claim 10
Dependent Claim
21 words
The ozone generator according to claim 1, wherein said TiO 2 has a relative dielectric constant, ε r , of 100.
Claim 11
Dependent Claim
23 words
The ozone generator according to claim 1, wherein between the dielectric layer and the first electrode is a discharge gap of 0.6-2 mm.
Claim 12
Dependent Claim
62 words
The ozone generator according to claim 1, wherein said dielectric layer comprises 42% by volume of said hardenable plastic material, about 20% by volume of said barium titanate powder and about 38% by volume of said coarser-grain TiO 2 , having a relative dielectric constant for the entire layer of approximately 30 and having a long-term dielectric strength of over 2000 V/mm.
References Cited (Backward Citations)
US3666505A
Cited
US3673119A
Cited
FR2040919A5
Cited
JPS486352U
Cited
JPS51103095A
Cited
US4222783A
Cited
US4257856A
Cited
DE3128746A1
Cited
JPS58115004A
Cited
US4595515A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |