Patent US2912481A successfully refreshed from Google Patents.
Patent US2736674A successfully refreshed from Google Patents.
US2736674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forging aluminum alloy disc wheels
Assignee: Alcoa Corp
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Filing: 1954-10-18
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Granted: 1956-02-28
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Expires: 1974-10-18
Abstract
No abstract record available.
Inventors
- 👤 Edward H Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:20
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/28; B21K1/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49481; Y10T29/49492; Y10T29/49496; Y10T29/49504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
THE METHOD OF MAKING PRECIPITATION HARDENED DEEP DRAWN CUP SHAPED FORGED DISC WHEELS OF HEAT TREATABLE ALUMINUM BASE ALLOYED COMPRISING HOT FORGING FROM FLAT STOCK A CONTOURED DISC ONE SURFACE OF WHICH CONSISTS OF A SUBSTANTIALLY FLAT PORTION EXTENDING INWARDLY FROM THE EDGE AND MERGING INTO A CENTRAL DEPRESSED AREA WHILE THE OTHER AND OPPOSITE SURFACE CONSISTS OF A FLAT INCLINED PORTION ADJACENT THE EDGE, SAID INCLINED PORTION EXTENDING UPWARDLY TOWARD AND MERGING WITH AN ANNULAR RELATIVELY WIDE ROUNDED CHEEK SECTION, AND A SUBSTANTIALLY FLAT CENTRAL PORTION WITHIN SAID ANNULAR CHEEK SECTION, SAID CENTRAL FLAT PORTIN BEING OPPOSITE THE DEPRESED AREA ON THE OTHER SIDE OF THE DISC, HOT PRESSING SAID DISC INTO A CUP SHAPE OF SUBSTANTIALLY THE DEPTH OF THE FINAL WHEEL WITH SAID FLAT AND DEPRESSED AREA SURFACES FORMING THE INTERIOR SURFACE OF THE CUP, HOT PRESSING SAID CUP A SECOND TIME TO COMPLETE SHAPING OF THE WHEEL BODY, SOLUTION HEAT TREATING SAID WHEEL BODY, QUENCHING IT, STRETCHING SAID QUENCHED BODY WHEREBY THE DIAMETER OF THE WHEEL IS SLIGHTLY INCREASED AND THE METAL IS COLD WORKED AND THEREAFTER PRECIPITATION HARDENING SAID COLD WORKED WHEEL BODY.
Claim 2
Independent Claim
188 words
THE METHOD OF MAKING PRECIPITATION HARDENED DEEP DRAWN CUP SHAPED FORGED DISC WHEELS OF HEAT TREATABLE ALUMINUM BASE ALLOYED COMPRISING HOT FORGING FROM FLAT STOCK A CONTOURED DISC ONE SURFACE OF WHICH CONSISTS OF A SUBSTANTIALLY FLAT PORTION EXTENDING INWARDLY FROM THE EDGE AND MERGING INTO A CENTRAL DEPRESSED AREA WHILE THE OTHER AND OPPOSITE SURFACE CONSISTS OF A FLAT INCLINED PORTION ADJACENT THE EDGE, SAID INCLINED PORTION EXTENDING UPWARDLY TOWARD AND MERGING WITH AN ANNULAR RELATIVELY WIDE ROUNDED CHEEK SECTION, AND A SUBSTANTIALLY FLAT CENTRAL PORTION WITHIN SAID ANNULAR CHEEK SECTION, SAID CENTRAL FLAT PORTIN BEING OPPOSITE THE DEPRESED AREA ON THE OTHER SIDE OF THE DISC, HOT PRESSING SAID DISC INTO A CUP SHAPE OF SUBSTANTIALLY THE DEPTH OF THE FINAL WHEEL WITH SAID FLAT AND DEPRESSED AREA SURFACES FORMING THE INTERIOR SURFACE OF THE CUP, HOT PRESSING SAID CUP A SECOND TIME TO COMPLETE SHAPING OF THE WHEEL BODY, SOLUTION HEAT TREATING SAID WHEEL BODY, QUENCHING IT, STRETCHING SAID QUENCHED BODY WHEREBY THE DIAMETER OF THE WHEEL IS SLIGHTLY INCREASED AND THE METAL IS COLD WORKED AND THEREAFTER PRECIPITATION HARDENING SAID COLD WORKED WHEEL BODY.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |