Patent US3680201A successfully refreshed from Google Patents.
US3680201A
Expired / Lapsed
US
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Process for brazing zirconium alloy elements
Assignee: Westinghouse Canada Inc
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Filing: 1969-02-13
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Granted: 1972-08-01
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Expires: 1989-02-13
Abstract
Abstract Method of Joining a zirconium alloy spacer to a zirconium alloy tube by placing a quantity of beryllium at a point outside the joint between the tube and spacer and heating the tube and spacer to form a liquid eutectic with the zirconium alloy.
Inventors
- 👤 Gavin Mcgregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:11
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/20; B23K35/00; B23K35/001; B23K35/005; B23K35/22; B23K35/24; B23K35/30; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12396; Y10T428/12493; Y10T428/12729; Y10T428/12771; Y10T428/12806
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
15 words
The method of claim 1 wherein the heating process is carried out in a vacuum.
Claim 2
Dependent Claim
28 words
The method of claim 1 wherein the spacer when arranged contiguous to the surface of the tube is maintained there, by spot welding the spacer to the tube.
Claim 3
Dependent Claim
29 words
The method of claim 3 wherein the face of the spacer is provided with a protrusion near its center to assist in spot welding the spacer to the tube.
Claim 4
Dependent Claim
33 words
The method of claim 1 wherein the face of the spacer is provided with channels to assist the flow of alloy into the space between the tube and the face of the spacer.
References Cited (Backward Citations)
US2146823A
Cited
US2424522A
Cited
US2568242A
Cited
US3345267A
Cited
US3419954A
Cited
US3389057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |