US3977869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indium-containing, low silver copper-base filler metal
Assignee: Eutectic Corp
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Filing: 1975-08-14
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Granted: 1976-08-31
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Expires: 1995-08-14
Abstract
Abstract A filler metal composition and method are provided for producing strong brazed joints between metal parts, e.g. steel parts, assembled in joint-forming relationship with each other, the filler metal comprising an indium-containing, low silver, copper base brazing alloy consisting essentially by weight of about 0.5% to 15% Ag, about 1% to 14% In, about 50% to 85% Cu, up to about 0.6% Si and the balance essentially zinc.
Inventors
- 👤 Hans T. Steine
- 👤 Wolfgang Simm
- 👤 Joseph F. Quaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:01
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/30; B23K35/302; C; C22; C22C; C22C9/00; C22C9/04; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12903; Y10T428/12917
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
A filler metal for use in brazing metal parts together, said filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially by weight of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn.
Claim 2
Dependent Claim
51 words
A filler metal for use in brazing metal parts together, said filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially by weight of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn.
Claim 3
Dependent Claim
37 words
The filler metal of claim 1, wherein the composition consists essentially of about 1 to 10% Ag, about 2.5 to 10% In, about 55 to 80% Cu, up to about 0.4% Si and the balance essentially Zn.
Claim 4
Dependent Claim
43 words
The filler metal of claim 2, wherein the composition consists essentially of about 2.5 to 10% Ag, about 2.5 to 10% In, about 60 to 70% Cu, up to about 0.2% Si and the balance essentially Zn ranging from about 10 to 35%.
Claim 5
Dependent Claim
55 words
A brazed joint comprising at least a pair of metal parts joined together by a filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially by weight of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn.
Claim 6
Dependent Claim
55 words
A brazed joint comprising at least a pair of metal parts joined together by a filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially by weight of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn.
Claim 7
Dependent Claim
42 words
The brazed joint of claim 4, wherein the filler metal composition in the joint consists essentially of about 1 to 10% Ag, about 2.5 to 10% In, about 55 to 80% Cu, up to about 0.4% Si and the balance essentially Zn.
Claim 8
Dependent Claim
48 words
The brazed joint of claim 4, wherein the filler metal composition in the joint consists essentially of about 2.5 to 10% Ag, about 2.5 to 10% In, about 60 to 70% Cu, up to about 0.2% Si and the balance essentially Zn ranging from about 10 to 35%.
Claim 9
Independent Claim
116 words
A method of brazing metal parts together which comprises, assembling said metal parts in joint-forming relationship with each other with a filler metal disposed in brazing proximity thereto, said filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn, applying heat to said joint-forming assembly and upon said filler metal sufficient to melt said filler metal and cause it to flow in and about the joint-forming portion of said assembly and then allowing the molten filler metal to solidify and form a strong joint between said metal parts.
Claim 10
Independent Claim
116 words
A method of brazing metal parts together which comprises, assembling said metal parts in joint-forming relationship with each other with a filler metal disposed in brazing proximity thereto, said filler metal comprising an indium-containing, low silver, copper-base brazing alloy consisting essentially of about 0.5 to 15% Ag, about 1 to 14% In, about 50 to 85% Cu, up to about 0.6% Si and the balance essentially Zn, applying heat to said joint-forming assembly and upon said filler metal sufficient to melt said filler metal and cause it to flow in and about the joint-forming portion of said assembly and then allowing the molten filler metal to solidify and form a strong joint between said metal parts.
Claim 11
Dependent Claim
40 words
The method of claim 7, wherein the filler metal forming the joint consists essentially of about 1 to 10% Ag, about 2.5 to 10% In, about 55 to 80% Cu, up to about 0.4% Si and the balance essentially Zn.
Claim 12
Dependent Claim
46 words
The method of claim 7, wherein the filler metal forming the joint consists essentially of about 2.5 to 10% Ag, about 2.5 to 10% In, about 60 to 70% Cu, up to about 0.2% Si and the balance essentially Zn ranging from about 10 to 35%.
Claim 13
Dependent Claim
19 words
The method of claim 7, wherein said method is carried out in the brazing together of ferrous metal parts.
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |