US2756487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming passages in a forgewelded sheet metal structure
Assignee: Motors Liquidation Co
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Filing: 1952-06-04
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Granted: 1956-07-31
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Expires: 1972-06-04
Abstract
No abstract record available.
Inventors
- 👤 John H Heidorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:05
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/04; B21D53/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49366; Y10T29/49369; Y10T29/49371; Y10T29/49805; Y10T29/49995
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
THE PROCESS OF FORMING A SINGLE SHEET OF METAL HAVING WITHIN ITS INTERIOR A PASSAGEWAY OF PREDETERMINED CONFIGURATION WHICH CONSISTS IN SUPERIMPOSING ONE UPON THE OTHER TWO WELDABLE SHEETS OF METAL HAVING THEREBETWEEN A STOP-WELD MATERIAL ARRANGED IN THE CONFIGURATION OF THE DESIRED PASSAGEWAY, FORGE WELDING THE TWO SHEETS BY HOT ROLLING THE TWO SHEETS INTO A SINGLE COMPOSITE SHEET OF GREATER LENGTH AND LESS THICKNESS, COUNTERBORING THROUGH THE ONE SIDE OF SAID COMPOSITE SHEET TO THE DEPTH OF SAID STOP-WELD MATERIAL AFTER SAID FORGE WELDING, ATTACHING A TUBE TO SAID ONE SIDE IN ALIGNMENT WITH SAID COUNTERBORE AND THEREAFTER EXPANDING THE SHEET TO FORM SAID PASSAGEWAY BY APPLYING FLUID PRESSURE THROUGH SAID TUBING.
Claim 2
Dependent Claim
114 words
THE PROCESS OF FORMING A SINGLE SHEET OF METAL HAVING WITHIN ITS INTERIOR A PASSAGEWAY OF PREDETERMINED CONFIGURATION WHICH CONSISTS IN SUPERIMPOSING ONE UPON THE OTHER TWO WELDABLE SHEETS OF METAL HAVING THEREBETWEEN A STOP-WELD MATERIAL ARRANGED IN THE CONFIGURATION OF THE DESIRED PASSAGEWAY, FORGE WELDING THE TWO SHEETS BY HOT ROLLING THE TWO SHEETS INTO A SINGLE COMPOSITE SHEET OF GREATER LENGTH AND LESS THICKNESS, COUNTERBORING THROUGH THE ONE SIDE OF SAID COMPOSITE SHEET TO THE DEPTH OF SAID STOP-WELD MATERIAL AFTER SAID FORGE WELDING, ATTACHING A TUBE TO SAID ONE SIDE IN ALIGNMENT WITH SAID COUNTERBORE AND THEREAFTER EXPANDING THE SHEET TO FORM SAID PASSAGEWAY BY APPLYING FLUID PRESSURE THROUGH SAID TUBING.
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) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |