Patent US3830262A successfully refreshed from Google Patents.
US3830262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Article for soldering aluminum to copper
Assignee: Eaton Aeroquip LLC
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Filing: 1972-04-20
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Granted: 1974-08-20
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Expires: 1992-04-20
Abstract
Abstract A copper sleeve on its inside is placed in one end of a slidable barrel on a hand tool. The end of an aluminum tube is clamped in alignment with the barrel so that it contacts a flared end of the sleeve. Heat and axial hand pressure are applied to the barrel until the sleeve is forced over the aluminum tube. The tube may then be soft soldered to a brass, copper or steel fitting.
Inventors
- 👤 E Lago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:30
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12736; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12861; Y10T428/12903; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
As an article of manufacture for facilitating the connection of aluminum to brass, copper or steel by conventional low temperature soft soldering means, the combination comprising an aluminum tube, a thin copper sleeve having an outside diameter substantially equal to that of the tube, a flared end on said sleeve, and a tinning material on the interior surface of said sleeve, whereby the sleeve may be force fit onto said tube end with the application of heat at a high temperature which melts said tinning material and forms a hard solder joint, and whereby thereafter said sleeve may be soft soldered at said low temperature to brass, copper or steel without melting said hard solder joint.
Claim 2
Dependent Claim
116 words
As an article of manufacture for facilitating the connection of aluminum to brass, copper or steel by conventional low temperature soft soldering means, the combination comprising an aluminum tube, a thin copper sleeve having an outside diameter substantially equal to that of the tube, a flared end on said sleeve, and a tinning material on the interior surface of said sleeve, whereby the sleeve may be force fit onto said tube end with the application of heat at a high temperature which melts said tinning material and forms a hard solder joint, and whereby thereafter said sleeve may be soft soldered at said low temperature to brass, copper or steel without melting said hard solder joint.
Claim 3
Dependent Claim
26 words
The combination according to claim 1, the end of said sleeve opposite said flare having a radial notch for the reception of a torque applying member.
Claim 4
Dependent Claim
14 words
The combination according to claim 1, said tinning material being a zinc base solder.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |