Patent US5572254A successfully refreshed from Google Patents.
US4579282A
Expired / Lapsed
US
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Gas burner for wire fed metal-spraying pistol
Assignee: STATNI VYZKUMNY USTAV OCHRANY MATERIALU GV
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Filing: 1983-07-20
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Granted: 1986-04-01
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Expires: 2003-07-20
Abstract
Abstract A gas burner for a metal-spraying pistol wherein wire is melted and the melt is atomized by gas flame. The burner is characterized in that a jet insert of abrasion resistant material which is positioned in the jet and serves for the advance of the wire, is separated on most of its surface from the jet, or from other parts of the burner, by an air gap which communicates, on the one hand, with a pressure air supply and, on the other hand, with a space provided between the jet insert and the wire.
Inventors
- 👤 Vaclav Navara
- 👤 Frantisek Novak
- 👤 Josef Jezek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:13
CPC Classifications
H; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/32; H05H1/34; B; B05; B05B; B05B7/00; B05B7/16; B05B7/20; B05B7/201; B05B7/203
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
138 words
A gas burner for a wire-processing metal-spraying pistol, the burner comprising: a jet having a front face rearwardly delimiting a combustion chamber; means including feed passages opening directly only into the combustion chamber for supplying combustion gases to the combustion chamber forward of the front face; a jet insert of abrasion-resistant material received in said jet and having a front face spaced backward from the front face of the jet and forming rearward of the combustion chamber a forechamber; means for supplying a fusible wire through the insert and through the forechamber to the combustion chamber; and means including channels opening directly into the forechamber for feeding air via these channels under pressure to the forechamber, whereby the air and combustion gases burn in the combustion chamber to melt the wire and expel it forward from the burner.
Claim 2
Dependent Claim
138 words
A gas burner for a wire-processing metal-spraying pistol, the burner comprising: a jet having a front face rearwardly delimiting a combustion chamber; means including feed passages opening directly only into the combustion chamber for supplying combustion gases to the combustion chamber forward of the front face; a jet insert of abrasion-resistant material received in said jet and having a front face spaced backward from the front face of the jet and forming rearward of the combustion chamber a forechamber; means for supplying a fusible wire through the insert and through the forechamber to the combustion chamber; and means including channels opening directly into the forechamber for feeding air via these channels under pressure to the forechamber, whereby the air and combustion gases burn in the combustion chamber to melt the wire and expel it forward from the burner.
Claim 3
Dependent Claim
30 words
A gas burner as claimed in claim 1, wherein the jet and jet insert are centered on a burner axis and the channels are oriented obliquely to the burner axis.
Claim 4
Dependent Claim
89 words
A gas burner as claimed in claim 2, wherein the jet insert and the wire define a space that has an entry end and, axially offset therefrom, a rear end and that is several times conically reduced in diameter in axially spaced zones from the entry end to the exit end with a conicity angle exceeding 24°, the jet insert being formed with an aerating hole connected to the air-supply means to receive pressurized air therefrom and opening tangentially into the space between the jet insert and the wire.
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) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |