US4642437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrode roll for electric resistance welding
Assignee: Daiwa Can Co Ltd
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Filing: 1985-12-20
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Granted: 1987-02-10
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Expires: 2005-12-20
Abstract
Abstract An electrode roll for electric resistance welding which contains a stator member at least partly made of Cu or Cu alloy, a rotor member at least partly made of Cu or Cu alloy and rotatably mounted on the stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap between the stator and rotor members, and portions of those two members facing the gap and being made of Cu or Cu alloy are covered by an alloy layer containing Co and W in weight proportions of 90:10 to 30:70.
Inventors
- 👤 Masatoshi Yamamoto
- 👤 Yasushi Kawai
- 👤 Katsuyoshi Shudo
- 👤 Hiroyuki Kato
- 👤 Shunsuke Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:45
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K11/00; B23K11/30; B23K11/3036; B23K11/3045; H; H01; H01R; H01R39/00; H01R39/64; H01R39/646
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
An electrode roll for electric resistance welding comprising a stator member at least partly made of copper or a copper alloy, a rotor member at least partly made of copper or a copper alloy and rotatably mounted on said stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap defined between said stator and rotor members, wherein portions of said stator and rotor members facing said annular gap and being made of copper or a copper alloy are covered by an alloy layer containing cobalt and tungsten in weight proportions of 90:10 to 30:70.
Claim 2
Dependent Claim
103 words
An electrode roll for electric resistance welding comprising a stator member at least partly made of copper or a copper alloy, a rotor member at least partly made of copper or a copper alloy and rotatably mounted on said stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap defined between said stator and rotor members, wherein portions of said stator and rotor members facing said annular gap and being made of copper or a copper alloy are covered by an alloy layer containing cobalt and tungsten in weight proportions of 90:10 to 30:70.
Claim 3
Dependent Claim
143 words
An electrode roll for electric resistance welding comprising a stator member at least partly made of copper or a copper alloy, a rotor member at least partly made of copper or a copper alloy and rotatably mounted on said stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap defined between said stator and rotor members, wherein portions of said stator and rotor members facing said annular gap and being made of copper or a copper alloy are covered by an alloy layer containing cobalt and tungsten in weight proportions of 90:10 to 30:70 and then covered by at least one metal layer composed of one member of a group consisting of tin, zinc, silver, gallium, indium and aluminum, or at least one alloy layer composed of two or more members of said group.
Claim 4
Dependent Claim
143 words
An electrode roll for electric resistance welding comprising a stator member at least partly made of copper or a copper alloy, a rotor member at least partly made of copper or a copper alloy and rotatably mounted on said stator member, and a fusible alloy mainly composed of gallium and filling as a conductive medium an annular gap defined between said stator and rotor members, wherein portions of said stator and rotor members facing said annular gap and being made of copper or a copper alloy are covered by an alloy layer containing cobalt and tungsten in weight proportions of 90:10 to 30:70 and then covered by at least one metal layer composed of one member of a group consisting of tin, zinc, silver, gallium, indium and aluminum, or at least one alloy layer composed of two or more members of said group.
Claim 5
Dependent Claim
28 words
The electrode roll according to claim 1 or 2, wherein said fusible alloy mainly composed of gallium is a four-element alloy composed of gallium, indium, tin and zinc.
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) | 1990-02-09 | 1990-08-11 | 1991-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-09 | 1994-08-11 | 1995-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-09 | 1998-08-11 | 1999-02-10 | $7700.00 | Window Closed / Lapsed |