US2932863A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for welding
Assignee: Goldschmidt ETB GmbH
•
Filing: 1956-08-15
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Granted: 1960-04-19
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Expires: 1976-08-15
Abstract
No abstract record available.
Inventors
- 👤 Ahlert Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:35
CPC Classifications
E; E01; E01B; E01B11/00; E01B11/44; E01B11/52; Y; Y10; Y10S; Y10S164/00; Y10S164/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR THE ALUMINOTHERMAL WELDING OF WORKPIECES SUCH AS RAILS BY THE INTERMEDIATE CASTING TECHNIQUE, WHICH COMPRISES: (A) SURROUNDING THE PORTIONS OF THE WORKPIECES TO BE WELDED WITH A MULTIPART FRAGILE MOLD, (B) CLAMPING SAID MULTIPART FRAGILE MOLD INTO PLACE AROUND SAID WORKPIECES, (C) PREHEATING THE PORTIONS OF THE WORKPIECES WHICH ARE TO BE WELDED BY LIMITING THE PATH OF PREHEATING FLAMES AND GASES TO A DIRECTION WHICH IS DOWNWARDLY FROM THE TOP AREA TO THE BOTTOM AREA OF SAID WORKPIECES AND THEN CAUSING THE PREHEATING FLAMES AND GASES TO REVERSE THEIR PATH AND FLOW UPWARDLY FROM THE BOTTOM PORTION PAST THE TOP PORTION OF SAID WORKPIECES,
Claim 2
Dependent Claim
108 words
A PROCESS FOR THE ALUMINOTHERMAL WELDING OF WORKPIECES SUCH AS RAILS BY THE INTERMEDIATE CASTING TECHNIQUE, WHICH COMPRISES: (A) SURROUNDING THE PORTIONS OF THE WORKPIECES TO BE WELDED WITH A MULTIPART FRAGILE MOLD, (B) CLAMPING SAID MULTIPART FRAGILE MOLD INTO PLACE AROUND SAID WORKPIECES, (C) PREHEATING THE PORTIONS OF THE WORKPIECES WHICH ARE TO BE WELDED BY LIMITING THE PATH OF PREHEATING FLAMES AND GASES TO A DIRECTION WHICH IS DOWNWARDLY FROM THE TOP AREA TO THE BOTTOM AREA OF SAID WORKPIECES AND THEN CAUSING THE PREHEATING FLAMES AND GASES TO REVERSE THEIR PATH AND FLOW UPWARDLY FROM THE BOTTOM PORTION PAST THE TOP PORTION OF SAID WORKPIECES,
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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) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |