US4039145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic powdering nozzle
Assignee: AIR-INDUSTRIE
•
Filing: 1975-07-28
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Granted: 1977-08-02
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Expires: 1995-07-28
Abstract
Abstract An electrostatic powdering nozzle comprising means for avoiding the fixing of powder particles on at least one of the electrodes, the said means consisting either in constructing at least one of the said electrodes in graphite or silicon, or in constructing at least one of these electrodes in electrically conductive porous material and in blowing a stream of gas through this or these electrodes.
Inventors
- 👤 Noel Felici
- 👤 Elie Gartner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:32
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
70 words
In a powder-ionizing nozzle for the electrostatic spraying of powder particles using a high voltage not greater than 10 kilovolts, said nozzle comprising a central electrode surrounded by a counter-electrode radially spaced therefrom, the improvement according to which said counter-electrode is made of an electrically conductive material permeable to gas and said nozzle comprises means for blowing a stream of auxiliary gas radially through said counter-electrode toward said central electrode.
Claim 2
Dependent Claim
70 words
In a powder-ionizing nozzle for the electrostatic spraying of powder particles using a high voltage not greater than 10 kilovolts, said nozzle comprising a central electrode surrounded by a counter-electrode radially spaced therefrom, the improvement according to which said counter-electrode is made of an electrically conductive material permeable to gas and said nozzle comprises means for blowing a stream of auxiliary gas radially through said counter-electrode toward said central electrode.
Claim 3
Dependent Claim
15 words
Nozzle as claimed in claim 1 comprising at its outlet a third, electrically isolated electrode.
Claim 4
Dependent Claim
14 words
Nozzle as claimed in claim 1 in which said counter-electrode has a converging portion.
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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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |