Patent US4188523A successfully refreshed from Google Patents.
US4188523A
Expired / Lapsed
US
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Roll electrode for use in a seam welding machine
Assignee: Fuji Industrial Co Ltd
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Filing: 1978-06-15
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Granted: 1980-02-12
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Expires: 1998-06-15
Abstract
Abstract The roll electrode comprises a stator member and a rotor member surrounding the stator member with an annular gap therebetween and a liquid metal is filled in the gap. The liquid metal has a composition consisting of 69.5±5.0 atomic % of Ga, 15.2±1.0 atomic % of In, 6.1±1.0 atomic % Sn, 4.5±0.8 atomic % of Zn, 3.2±0.5 atomic % of Ag and 1.5±0.5 atomic % of Al.
Inventors
- 👤 Jun Kawai
- 👤 Jun-ichi Homma
- 👤 Saburo Watanabe
- 👤 Masahiro Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:53
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3036; B23K11/3045; B23K11/3054; B23K11/36; B23K11/362; B23K11/368; H; H01; H01R; H01R39/00; H01R39/64; H01R39/646; B23K2101/00; B23K2101/04; B23K2101/12; B23K2101/125
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
145 words
In a roll electrode for use in a seam welding machine comprising a stator member, a rotor member surrounding said stator member with an annular gap therebetween, a bearing member for rotatably supporting said rotor member to rotate about the axis of said stator member, and electrical conductive liquid filled in said annular gap for electrically connecting said rotor member to said stator member, the improvement wherein said electrical conductive liquid comprises a liquid metal consisting of 69.5±5.0 atomic % of Ga, 15.2±1.0 atomic % of In, 6.1±1.0 atomic % of Sn, 4.5±0.8 atomic % of Zn, 3.2±0.5 atomic % of Ag and 1.5±0.5 atomic % of Al, and wherein a substance comprising one or more of W, Mo, V, Ti, mixture thereof and alloys therefrom is secured to the lower portion of the outer surface of said stator member which defines said annular gap.
Claim 2
Dependent Claim
145 words
In a roll electrode for use in a seam welding machine comprising a stator member, a rotor member surrounding said stator member with an annular gap therebetween, a bearing member for rotatably supporting said rotor member to rotate about the axis of said stator member, and electrical conductive liquid filled in said annular gap for electrically connecting said rotor member to said stator member, the improvement wherein said electrical conductive liquid comprises a liquid metal consisting of 69.5±5.0 atomic % of Ga, 15.2±1.0 atomic % of In, 6.1±1.0 atomic % of Sn, 4.5±0.8 atomic % of Zn, 3.2±0.5 atomic % of Ag and 1.5±0.5 atomic % of Al, and wherein a substance comprising one or more of W, Mo, V, Ti, mixture thereof and alloys therefrom is secured to the lower portion of the outer surface of said stator member which defines said annular gap.
Claim 3
Dependent Claim
27 words
A roll electrode according to claim 1 wherein the quantity of said liquid metal corresponds to from 30 to 97.8% of the volume of said air gap.
Claim 4
Dependent Claim
17 words
A roll electrode according to claim 1 wherein said secured substance takes the form of a powder.
Claim 5
Dependent Claim
17 words
A roll electrode according to claim 1 wherein said secured substance takes the form of fine wires.
Claim 6
Dependent Claim
16 words
A roll electrode according to claim 1 wherein said secured substance takes the form of foils.
Claim 7
Independent Claim
94 words
A method of operating a seam welding machine including a water cooled roll electrode filled with an electroconductive liquid metal, said method comprising the steps of passing welding current of a predetermined value through said roll electrode for a predetermined time before commencing welding operation, operating said welding machine by passing said welding current and cooling water through said roll electrode, stopping the operation of said welding machine and then passing a constant current having a value of from 0.01 to 0.1% of said welding current through said roll electrode for a predetermined time.
Claim 8
Independent Claim
94 words
A method of operating a seam welding machine including a water cooled roll electrode filled with an electroconductive liquid metal, said method comprising the steps of passing welding current of a predetermined value through said roll electrode for a predetermined time before commencing welding operation, operating said welding machine by passing said welding current and cooling water through said roll electrode, stopping the operation of said welding machine and then passing a constant current having a value of from 0.01 to 0.1% of said welding current through said roll electrode for a predetermined time.
Claim 9
Dependent Claim
40 words
A method according to claim 6, wherein the welding current of the predetermined value is passed through said roll electrode for the predetermined time before commencing the welding operation while preventing the flow of cooling water through said roller electrode.
Claim 10
Dependent Claim
37 words
A method according to claim 6 wherein the welding current of the predetermined value is passed through the roll electrode for the predetermined time before commencing the welding operation while passing cooling water through said roll electrode.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-02-11 | 1983-08-13 | 1984-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-11 | 1987-08-13 | 1988-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-11 | 1991-08-13 | 1992-02-12 | $7700.00 | Window Closed / Lapsed |