Patent US3307388A successfully refreshed from Google Patents.
US3307388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheel manufacture
Assignee: Sheffield Corp
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Filing: 1963-05-23
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Granted: 1967-03-07
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Expires: 1983-05-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Dewey H Brooks
- 👤 Orville W Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:34
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/26; B21D53/261
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
A SET OF COOPERATING FORMING DIES FOR USE IN THE MANUFACTURE OF A SHEET METAL WHEEL HAVING A DISK PORTION AND AN INTEGRAL SUBSTANTIALLY V-SHAPED PERIPHERAL GROOVE COMPRISING, A PUNCH HAVING A CYLINDRICAL BODY PORTION TERMINATING IN A CIRCULAR CURVED END PORTION OF REDUCED DIAMETER WITH A TAPERED CAMMING SURFACE BETWEEN THE BODY PORTION AND THE END PORTION, THE AXIAL LENGTH OF THE CAMMING SURFACE BEING APPROXIMATELY THE SAME AS THE DISTANCE FROM THE CAMMING SURFACE TO THE END OF THE END PORTION AND THE PERIPHERAL PART OF THE END PORTION BEING ROUNDED, AND AN OUTER DIE EXTENDING AROUND THE PUNCH AND HAVING AN ANNULAR BLANK HOLDING RECESS, RADIALLY OPERATIVE BLANK HOLDING DIE SECTIONS COOPERATING WITH THE OUTER DIE, AND AN OPPOSING DIE OPPOSING THE PUNCH AND HAVING A SHALLOW CENTRAL RECESS SHAPED IN ACCORDANCE WITH THE PUNCH END AND ADAPTED FOR ENGAGEMENT WITH THE CENTRAL PORTION OF THE BLANK TO BE FORMED AND ENGAGEABLE WITH THE OUTER DIE TO MOVE THEREWITH.
Claim 2
Dependent Claim
162 words
A SET OF COOPERATING FORMING DIES FOR USE IN THE MANUFACTURE OF A SHEET METAL WHEEL HAVING A DISK PORTION AND AN INTEGRAL SUBSTANTIALLY V-SHAPED PERIPHERAL GROOVE COMPRISING, A PUNCH HAVING A CYLINDRICAL BODY PORTION TERMINATING IN A CIRCULAR CURVED END PORTION OF REDUCED DIAMETER WITH A TAPERED CAMMING SURFACE BETWEEN THE BODY PORTION AND THE END PORTION, THE AXIAL LENGTH OF THE CAMMING SURFACE BEING APPROXIMATELY THE SAME AS THE DISTANCE FROM THE CAMMING SURFACE TO THE END OF THE END PORTION AND THE PERIPHERAL PART OF THE END PORTION BEING ROUNDED, AND AN OUTER DIE EXTENDING AROUND THE PUNCH AND HAVING AN ANNULAR BLANK HOLDING RECESS, RADIALLY OPERATIVE BLANK HOLDING DIE SECTIONS COOPERATING WITH THE OUTER DIE, AND AN OPPOSING DIE OPPOSING THE PUNCH AND HAVING A SHALLOW CENTRAL RECESS SHAPED IN ACCORDANCE WITH THE PUNCH END AND ADAPTED FOR ENGAGEMENT WITH THE CENTRAL PORTION OF THE BLANK TO BE FORMED AND ENGAGEABLE WITH THE OUTER DIE TO MOVE THEREWITH.
References Cited (Backward Citations)
US2163003A
Cited
US2493053A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |