Patent US3942705A successfully refreshed from Google Patents.
US3942705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection for aluminum tubing during ultrasonic soldering
Assignee: Trane US Inc
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Filing: 1974-11-11
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Granted: 1976-03-09
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Expires: 1994-11-11
Abstract
Abstract The method of preventing surface erosion of a preselected portion of aluminum tubing during the ultrasonic soldering of a joint in another portion of the tubing. The preselected portion of tubing to be protected is coated prior to its being subjected to the ultrasonic soldering step so that the solder and its deoxidation action does not contact the aluminum surface of the preselected portion of the tube.
Inventors
- 👤 Michael R. Barbay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:23
CPC Classifications
B; B23; B23K; B23K3/00; B23K3/06; B23K3/0646; B23K3/0661
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
The method of soldering a joint of an aluminum tubing assembly in a molten solder bath that is subjected to ultrasonic energy source comprising: immersing the tubing assembly in said bath so that said joint is in an area having a preselected level of solder cavitation sufficient to scrub surface oxide from said joint to cause the solder to adhere to said surface to seal said joint before surface erosion of said surface takes place; coating a portion of said tubing assembly prior to said immersing of the tube assembly with a layer of tin plating so that the surface area of said portion when in an area having a greater level of solder cavitation than said preselected level is protected from erosion damage in said area having a greater level of solder cavitation during the scrubbing and soldering of said joint in said preselected level.
Claim 2
Independent Claim
146 words
The method of soldering a joint of an aluminum tubing assembly in a molten solder bath that is subjected to ultrasonic energy source comprising: immersing the tubing assembly in said bath so that said joint is in an area having a preselected level of solder cavitation sufficient to scrub surface oxide from said joint to cause the solder to adhere to said surface to seal said joint before surface erosion of said surface takes place; coating a portion of said tubing assembly prior to said immersing of the tube assembly with a layer of tin plating so that the surface area of said portion when in an area having a greater level of solder cavitation than said preselected level is protected from erosion damage in said area having a greater level of solder cavitation during the scrubbing and soldering of said joint in said preselected level.
Claim 3
Dependent Claim
31 words
A method, as set forth in claim 1, wherein the coated portion of said tubing assembly when in said area of greater solder cavitation is closer to said ultrasonic energy source.
Claim 4
Dependent Claim
27 words
A method as set forth in claim 2 wherein the coating is tin plate having a thickness of between 2 to 6 × 10 - 5 inches.
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) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |