Patent US3666908A successfully refreshed from Google Patents.
US3666908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for vertical welding of aluminum
Assignee: L-Tec Co
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Filing: 1971-03-31
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Granted: 1972-05-30
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Expires: 1991-03-31
Abstract
Abstract A method for vertical welding of aluminum wherein a cavity is formed between aluminum plates by placing graphite retaining members on the outside surface thereof. At least one nonconsumable guide tube is placed in the cavity and a consumable wire is passed therethrough. A halogen base flux is fed into the cavity to shield the weld puddle and to provide a medium for resistance melting. Voltage is supplied to the wire from about 40 volts and 1,300 amps to about 75 volts and 400 amps. When multiple guide tubes and wires are used, the wire is skewed prior to entry into the non-consumable guide tube and rotated as it emerges therethrough to ensure complete fusion.
Inventors
- 👤 Alfred Buxton Crichton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:15
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/038; B23K35/00; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
13 words
Method according to claim 1 wherein said flux consists essentially of halogen compounds.
Claim 2
Dependent Claim
50 words
Method according to claim 2 wherein said flux comprises of from about 35 to about 60 weight per cent KCl; about 15 to about 35 weight per cent NaCl; about 15 to about 30 weight per cent NaA13F6; and from a trace up to about 10 weight per cent LiF.
Claim 3
Dependent Claim
32 words
Method according to claim 3 wherein said flux consists essentially of 45 weight per cent KCl; 27 weight per cent NaCl; 22 weight per cent NaAl3F6 and 6 weight per cent LiF.
Claim 4
Dependent Claim
38 words
Method according to claim 1 which includes skewing the consumable wire prior to its entry into the moveable non-consumable guide tube and rotating the end of said skewed consumable wire as it emerges from the other end thereof.
Claim 5
Dependent Claim
21 words
Method according to claim 1 wherein the space between the plates is from 1 3/8 inches to about 1 5/8 inches.
Claim 6
Dependent Claim
29 words
Method according to claim 1 wherein said graphite retaining members are provided with a reinforcement groove having an area of about 0.25 sq. in. to about 0.80 sq. in.
Claim 7
Dependent Claim
28 words
A method according to claim 1 wherein voltage is supplied to said consumable wire from about 40 volts and 1,300 amps to about 75 volts and 400 amps.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |