US4765846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for autogenic flame cutting with oxygen
Assignee: Messer Griesheim GmbH
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Filing: 1986-12-09
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Granted: 1988-08-23
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Expires: 2006-12-09
Abstract
Abstract A process for autogenic flame cutting with oxygen includes bringing the oxygen while in the liquid state to a high pressure and feeding the oxygen to the cutting location via a liquid jet cutting nozzle.
Inventors
- 👤 Paul Grohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
B; B23; B23K; B23K7/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
119 words
In a process for the autogenic flame cutting of metallic workpieces in which the site to be cut has been heated to ignition temperature and in which an oxygen stream is directed to the cutting site with the oxygen stream emerging from a cutting nozzle and with the nozzle and workpiece moving relative to each other to effect the cut, the improvement being in that the oxygen is brought to a high pressure of at least 200 bar while the oxygen is in a liquid state, and the liquid oxygen being fed to the cutting site via a liquid jet cutting nozzle to utilize the high kinetic energy of the liquid jet and to increase the cutting speed thereof.
Claim 2
Dependent Claim
119 words
In a process for the autogenic flame cutting of metallic workpieces in which the site to be cut has been heated to ignition temperature and in which an oxygen stream is directed to the cutting site with the oxygen stream emerging from a cutting nozzle and with the nozzle and workpiece moving relative to each other to effect the cut, the improvement being in that the oxygen is brought to a high pressure of at least 200 bar while the oxygen is in a liquid state, and the liquid oxygen being fed to the cutting site via a liquid jet cutting nozzle to utilize the high kinetic energy of the liquid jet and to increase the cutting speed thereof.
Claim 3
Dependent Claim
21 words
Process according to claim 1, characterized therein that the oxygen is brought to a pressure up to at least 4000 bar.
Claim 4
Dependent Claim
28 words
Process according to claim 1, characterized therein that the oxygen is brought to a pressure of between 200 and 900 bar by means of a high pressure pump.
Claim 5
Dependent Claim
22 words
Process according to claim 3, characterized therein that a pre-heater burner with which the surface temperature is raised to the ignition temperature.
Claim 6
Dependent Claim
22 words
Process according to claim 4, characterized therein that the line leading to the liquid jet cutting nozzle is cooled with liquid nitrogen.
Claim 7
Dependent Claim
22 words
Process according to claim 1, characterized therein that a pre-heater burner with which the surface temperature is raised to the ignition temperature.
Claim 8
Dependent Claim
22 words
Process according to claim 1, characterized therein that the line leading to the liquid jet cutting nozzle is cooled with liquid nitrogen.
Claim 9
Dependent Claim
16 words
Process according to claim 3, characterized therein that the pressure is between 300 and 600 bar.
Claim 10
Dependent Claim
13 words
Process according to claim 8, characterized therein that the pressure is 500 bar.
Claim 11
Dependent Claim
14 words
Process according to claim 1, characterized therein that continuous casting ingots are being cut.
Claim 12
Dependent Claim
88 words
In a device for autogenic flame cutting with oxygen with a supply apparatus for oxygen and with a cutting nozzle connected to the supply apparatus, the improvement being in that said supply apparatus is an insulated storage tank for liquid oxygen, and said cutting nozzle being designed as a liquid jet cutting nozzle which is connected with the storage space for liquid oxygen by means of an insulated line and a high pressure pump capable of bringing the liquid oxygen to a pressure of at least 200 bar.
Claim 13
Dependent Claim
88 words
In a device for autogenic flame cutting with oxygen with a supply apparatus for oxygen and with a cutting nozzle connected to the supply apparatus, the improvement being in that said supply apparatus is an insulated storage tank for liquid oxygen, and said cutting nozzle being designed as a liquid jet cutting nozzle which is connected with the storage space for liquid oxygen by means of an insulated line and a high pressure pump capable of bringing the liquid oxygen to a pressure of at least 200 bar.
Claim 14
Dependent Claim
18 words
Device according to claim 11, characterized therein that said liquid jet cutting nozzle is associated with a pre-heater.
Claim 15
Dependent Claim
16 words
Device according to claim 12, characterized therein that said insulated line is surrounded with liquid nitrogen.
References Cited (Backward Citations)
US2094641A
Cited
US2205499A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |