Patent US4201902A successfully refreshed from Google Patents.
US4201902A
Expired / Lapsed
US
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Electrode for air-carbon arc cutting and gouging
Assignee: Arcair Co
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Filing: 1979-01-22
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Granted: 1980-05-06
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Expires: 1999-01-22
Abstract
Abstract An aluminum coated carbon-graphite electrode for use in the air-carbon arc cutting and gouging process. Uniformly coating the electrode with commercially pure aluminum results in a lower operating noise level when the electrode is in use, a cleaner and safer work environment for the user and better performance than conventional electrodes. A further feature of the invention resides in lowering the operating air pressure in the torch when using the new electrodes to further reduce the operating noise level.
Inventors
- 👤 Perry J. Rieppel
- 👤 Raymond A. Sadauskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:09
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K35/0211; B23K35/0216
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A method of lowering the operating noise level at least 20 dbA of the conventional air-carbon arc cutting and gouging process by the steps of: replacing the conventional copper coated carbon-graphite electrode with a carbon-graphite electrode having a 0.002" to 0.012" of commercially pure aluminum as a coating uniform in thickness to ±0.001"; and operating said method at a maximum delivered air pressure as measured in the torch head of 60 psi.
Claim 2
Independent Claim
72 words
A method of lowering the operating noise level at least 20 dbA of the conventional air-carbon arc cutting and gouging process by the steps of: replacing the conventional copper coated carbon-graphite electrode with a carbon-graphite electrode having a 0.002" to 0.012" of commercially pure aluminum as a coating uniform in thickness to ±0.001"; and operating said method at a maximum delivered air pressure as measured in the torch head of 60 psi.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said delivered air pressure is between 40 and 60 psi.
References Cited (Backward Citations)
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US3131290A
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US3796853A
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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) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |