Patent US2470291A successfully refreshed from Google Patents.
Patent US3909581A successfully refreshed from Google Patents.
US3909581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable resistance welding electrode
Assignee: Duracell Inc USA
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Filing: 1973-06-25
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Granted: 1975-09-30
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Expires: 1993-06-25
Abstract
Abstract This invention relates to a new type of resistance welding composite electrode which is disposable utilizing an inexpensive metal or alloy having good electrical and thermal conductivity as a holder, and a metal or alloy also having good electrical and thermal conductivity and in addition good strength at resistance welding operating temperatures for the insert tip.
Inventors
- 👤 Carl A Stone
- 👤 Robert H Imes
- 👤 Peter C Murphy
- 👤 Robert D Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:54
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0205; B23K11/00; B23K11/30; B23K11/3009; B23K11/3018
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
146 words
A COMPOSITE DISPOSABLE RESISTANCE ELECTRODE CAP COMPRISNG A HOLDER MEMBE HAVING AN ENLARGED METAL CONTAINING SECTION THE METAL OF THE METAL CONTAINING HOLDER MEMBER SELECTED FROM THE GROUP CONSISTING OF A1, A1 ALLOYS, FE, FE ALLOYS, AND ZN AND ZN ALLOYS, AND A METAL CONTAINING TIP HAVING A SUBSTANTILLY FLAT CONTACT FACE ADAPTED TO ENGAGE WITH A WORKPIECE AND AN EXTERNAL TAPER GRADUALLY REDUCING IN CROSS SECTIONAL DIEMENSION TOWARD TH CONTACT FACE, THE TIP HAVING A PORTION RETAINED IN AN APERTURE OF THE ENLARGED SECTION OF THE HOLDER MEMBER TO CLOSE AN END OF THE APERTURE AND SO THAT THE THERMAL AND ELECTRICAL CONDUCTIVITY ARE POSSIBLE BETWEEN THE TIP AND THE ENGLARGED SECTION OF THE HOLDER MEMBER THE METAL OF THE METAL CONTAINING TIP SELECTED FROM THE GROUP CONSISTING OF CU, CU ALLOYS, W, W ALLOYS, MO, MO ALLOYS, AG ALLOYS, AU ALLOYS AND PT ALLOYS.
Claim 2
Dependent Claim
146 words
A COMPOSITE DISPOSABLE RESISTANCE ELECTRODE CAP COMPRISNG A HOLDER MEMBE HAVING AN ENLARGED METAL CONTAINING SECTION THE METAL OF THE METAL CONTAINING HOLDER MEMBER SELECTED FROM THE GROUP CONSISTING OF A1, A1 ALLOYS, FE, FE ALLOYS, AND ZN AND ZN ALLOYS, AND A METAL CONTAINING TIP HAVING A SUBSTANTILLY FLAT CONTACT FACE ADAPTED TO ENGAGE WITH A WORKPIECE AND AN EXTERNAL TAPER GRADUALLY REDUCING IN CROSS SECTIONAL DIEMENSION TOWARD TH CONTACT FACE, THE TIP HAVING A PORTION RETAINED IN AN APERTURE OF THE ENLARGED SECTION OF THE HOLDER MEMBER TO CLOSE AN END OF THE APERTURE AND SO THAT THE THERMAL AND ELECTRICAL CONDUCTIVITY ARE POSSIBLE BETWEEN THE TIP AND THE ENGLARGED SECTION OF THE HOLDER MEMBER THE METAL OF THE METAL CONTAINING TIP SELECTED FROM THE GROUP CONSISTING OF CU, CU ALLOYS, W, W ALLOYS, MO, MO ALLOYS, AG ALLOYS, AU ALLOYS AND PT ALLOYS.
Claim 3
Dependent Claim
25 words
The electrode cap of claim 1, including means capable of causing fluid to flow into the aperture of the holder member and adjacent the tip.
Claim 4
Dependent Claim
25 words
The electrode cap of claim 1, wherein the taper is at an angle of from about 20* to about 60* with respect to the horizontal.
Claim 5
Dependent Claim
17 words
The electrode cap of claim 3, wherein the taper angle is from about 30* to about 60*.
Claim 6
Dependent Claim
11 words
The electrode cap of claim 1, wherein the taper is curved.
References Cited (Backward Citations)
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Cited
US2051284A
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US2109461A
Cited
US2446932A
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |