US3706126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fusion bonding
Assignee: AT&T Inc
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Filing: 1971-02-23
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Granted: 1972-12-19
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Expires: 1991-02-23
Abstract
Abstract Workpieces fabricated from lead, or other metallic materials having substantially similar characteristics, are fusion bonded by first abutting the workpieces to define an interface therebetween, and the inserting a heated ram having a slot therein into the workpieces, at the interface, to create a localized zone of molten material about the ram and in the slot of the ram. The ram is then withdrawn, the molten material in the slot flows back into the interface, and all the molten material re-solidifies, thereby bonding the workpieces one to the other.
Inventors
- 👤 Robert Holbrook Cushman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:09
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
108 words
A method of bonding a first metallic workpiece to a second metallic workpiece, including the step of abutting said first and second workpieces to define an interface therebetween, characterized by the further steps of: forcing a heated ram having a slot centrally located therein into the body of said first and second workpieces, at said interface, the molten material displaced by said ram, as it penetrates said workpieces, being temporarily stored within said slot; and subsequently withdrawing said heated ram from said abutted first and second workpieces, the molten material within said slot flowing back into said interface and re-solidifying, thereby bonding said first and second workpieces together.
Claim 2
Independent Claim
108 words
A method of bonding a first metallic workpiece to a second metallic workpiece, including the step of abutting said first and second workpieces to define an interface therebetween, characterized by the further steps of: forcing a heated ram having a slot centrally located therein into the body of said first and second workpieces, at said interface, the molten material displaced by said ram, as it penetrates said workpieces, being temporarily stored within said slot; and subsequently withdrawing said heated ram from said abutted first and second workpieces, the molten material within said slot flowing back into said interface and re-solidifying, thereby bonding said first and second workpieces together.
Claim 3
Dependent Claim
48 words
A method of bonding according to claim 1 characterized by the further step of controlling the depth to which said heated ram penetrates said abutted first and second workpieces so that the molten region formed therein extends into said first and second workpieces for the entire depth thereof.
Claim 4
Dependent Claim
54 words
A method of bonding according to claim 1 characterized in that: at least one of said first and second workpieces is fabricated from: (1) a metal selected from the group consisting of lead, aluminum, zinc, cadmium and magnesium; or (2) metallic alloys having physical characteristics essentially similar to lead, aluminum, zinc, cadmium and magnesium.
Claim 5
Dependent Claim
24 words
A method of bonding according to claim 2 characterized in that at least one of said first and second workpieces is fabricated from lead.
Claim 6
Dependent Claim
25 words
A method of bonding according to claim 2 characterized by the further step of: restraining the flow of molten material away from said bond interface.
References Cited (Backward Citations)
US2360950A
Cited
US3016085A
Cited
US3254402A
Cited
US3357090A
Cited
US3373481A
Cited
US3531852A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |