Patent US3999014A successfully refreshed from Google Patents.
US3205340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding of tubes
Assignee: Foster Wheeler Inc
•
Filing: 1963-03-15
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Granted: 1965-09-07
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Expires: 1983-03-15
Abstract
No abstract record available.
Inventors
- 👤 Gotch Ronald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:43
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/02; B23K9/028; B23K9/0288; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A METHOD OF WELDING TUBES TO A TUBE SHEET COMPRISING THE STEPS OF: INSERTING A TUBE WITHIN A HOLE IN THE TUBE SHEET, THE OUTSIDE DIAMETER OF THE TUBE BEING SUBSTANTIALLY EQUAL TO THE INSIDE DIAMETER OF THE HOLE; EXPANDING THE TUBE WITHIN THE HOLE, THE AREA OF CONTACT BETWEEN THE TUBE AND THE TUBE SHEET BEING SUFFICIENT TO PROCURE A TIGHT WELD JOINT; PARTIALLY WITHDRAWING THE TUBE FROM THE TUBE SHEET TO ACCURATELY ALIGN THE TUBE IN THE TUBE SHEET, THE PREVIOUS EXPANSION OF THE TUBE WITHIN THE TUBE SHEET TO TIGHTEN SUFFICIENTLY THE JOINT TO ACCURATELY ALIGN THE TUBE IN THE HOLE IN THE TUBE SHEET AS THE TUBE IS PARTIALLY WITHDRAWN; FUSION WELDING THE TUBE TO THE TUBE SHEET ALONG THE AREA OF CONTACT FROM THE INSIDE OF TUBE WHEREBY A WELD BEAD IS FORMED INSIDE THE TUBE, THE DEPTH OF PENETRATION OF THE TUBE INTO THE TUBE SHEET AFTER THE TUBE HAS BEEN PARTIALLY WITHDRAWN BEING APPROXIMATELY EQUAL TO THE THICKNESS OF THE WALL OF THE TUBE.
Claim 2
Independent Claim
171 words
A METHOD OF WELDING TUBES TO A TUBE SHEET COMPRISING THE STEPS OF: INSERTING A TUBE WITHIN A HOLE IN THE TUBE SHEET, THE OUTSIDE DIAMETER OF THE TUBE BEING SUBSTANTIALLY EQUAL TO THE INSIDE DIAMETER OF THE HOLE; EXPANDING THE TUBE WITHIN THE HOLE, THE AREA OF CONTACT BETWEEN THE TUBE AND THE TUBE SHEET BEING SUFFICIENT TO PROCURE A TIGHT WELD JOINT; PARTIALLY WITHDRAWING THE TUBE FROM THE TUBE SHEET TO ACCURATELY ALIGN THE TUBE IN THE TUBE SHEET, THE PREVIOUS EXPANSION OF THE TUBE WITHIN THE TUBE SHEET TO TIGHTEN SUFFICIENTLY THE JOINT TO ACCURATELY ALIGN THE TUBE IN THE HOLE IN THE TUBE SHEET AS THE TUBE IS PARTIALLY WITHDRAWN; FUSION WELDING THE TUBE TO THE TUBE SHEET ALONG THE AREA OF CONTACT FROM THE INSIDE OF TUBE WHEREBY A WELD BEAD IS FORMED INSIDE THE TUBE, THE DEPTH OF PENETRATION OF THE TUBE INTO THE TUBE SHEET AFTER THE TUBE HAS BEEN PARTIALLY WITHDRAWN BEING APPROXIMATELY EQUAL TO THE THICKNESS OF THE WALL OF THE TUBE.
References Cited (Backward Citations)
US3125670A
Cited
US874084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-06 | 1969-03-08 | 1969-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-06 | 1973-03-08 | 1973-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-06 | 1977-03-08 | 1977-09-07 | $7700.00 | Window Closed / Lapsed |