US4199104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasma spraying apparatus
Assignee: Plasmainvent AG
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Filing: 1977-01-21
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Granted: 1980-04-22
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Expires: 1997-01-21
Abstract
Abstract Plasma spraying apparatus is provided with means for selective release of carrier gas for the coating powder prior to the injection of the powder into the plasma stream. The gas release is effected by one or two apertured tube wall portions associated with a closure sleeve slidable on the tube or by a swirl chamber with a lateral gas outlet provided with a filter and a regulating valve.
Inventors
- 👤 Johan M. Houben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/16; B05B7/22; B05B7/222; B05B7/226; H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A plasma spraying apparatus comprising a casing having an inlet and an outlet orifice; means for supplying a gas through said inlet to the interior of said casing; means for producing an electric arc within said casing interior to produce a plasma stream emerging through said outlet orifice; supply means for a coating powder in a carrier gas having an outlet for introducing said powder into said plasma stream; and release means for selectively and readily adjustably releasing carrier gas from said supply means upstream of said outlet, said release means comprising a chamber in said supply means, an adjustable gas outlet from said chamber, and an inlet tube for delivering powder to said chamber, said inlet tube being slidable lengthwise relatively to the interior of said chamber.
Claim 2
Dependent Claim
128 words
A plasma spraying apparatus comprising a casing having an inlet and an outlet orifice; means for supplying a gas through said inlet to the interior of said casing; means for producing an electric arc within said casing interior to produce a plasma stream emerging through said outlet orifice; supply means for a coating powder in a carrier gas having an outlet for introducing said powder into said plasma stream; and release means for selectively and readily adjustably releasing carrier gas from said supply means upstream of said outlet, said release means comprising a chamber in said supply means, an adjustable gas outlet from said chamber, and an inlet tube for delivering powder to said chamber, said inlet tube being slidable lengthwise relatively to the interior of said chamber.
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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) | 1983-04-22 | 1983-10-22 | 1984-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-22 | 1987-10-22 | 1988-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-22 | 1991-10-22 | 1992-04-22 | $7700.00 | Window Closed / Lapsed |