Patent US3349600A successfully refreshed from Google Patents.
US3349600A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming a plurality of axially spaced beads in a hollow, substantiallycylindrical sheet metal blank
Assignee: Inland Steel Co
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Filing: 1964-09-17
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Granted: 1967-10-31
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Expires: 1984-09-17
Abstract
No abstract record available.
Inventors
- 👤 Leonardus A N Bijvoet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:00
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/02; B21D22/06; B21D17/00; B21D17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
IN AN APPARATUS FOR EXPANDING A PLURALITY OF AXIALLY SPACED RADIALLY OUTWARDLY EXTENDING PERIPHERAL BEADS SEPARATED BY RADIALLY INWARDLY EXTENDING PERIPHERAL FURROWS IN A HOLLOW, SUBSTANTIALLY CYLINDRICAL SHEET METAL BLANK WHEREIN THE AVERAGE NET AXIAL STRAIN PRODUCED IN THE BLANK DURING BEAD FORMATION IS MINIMIZED, THE COMBINATION COMPRISING A PLURALITY OF JUXTAPOSED CO-AXIALLY ARRANGED RADIALLY EXPANSIBLE AND CONTRACTIBLE DIE UNITS CORRESPONDING IN NUMBER TO THE BEADS TO BE FORMED, EACH OF SAID DIE UNITS COMPRISISNG A SET OF RADIALLY MOVABLE DIE SEGMENTS, A SINGLE LONGITUDINALLY SHIFTABLE ACTUATOR COMPLETELY MOVABLE THROUGH EACH OF SAID DIE UNITS DURING A POWER STROKE, SAID ACTUATOR INCLUDING MEANS FOR FORCIBLY EXPANDING SAID DIE UNIT IN SUCCESSION AND HOLDING AT LEAST ONE ALREADY EXPANDED DIE UNIT IN EXPANDING POSITION WHILE EXPANDING THE NEXT ADJACENT DIE UNIT, AND MEANS FOR CONTRACTING EACH OF ASID DIE UNITS AFTER IT HAS BEEN RELEASED BY SAID ACTUATOR.
Claim 2
Dependent Claim
147 words
IN AN APPARATUS FOR EXPANDING A PLURALITY OF AXIALLY SPACED RADIALLY OUTWARDLY EXTENDING PERIPHERAL BEADS SEPARATED BY RADIALLY INWARDLY EXTENDING PERIPHERAL FURROWS IN A HOLLOW, SUBSTANTIALLY CYLINDRICAL SHEET METAL BLANK WHEREIN THE AVERAGE NET AXIAL STRAIN PRODUCED IN THE BLANK DURING BEAD FORMATION IS MINIMIZED, THE COMBINATION COMPRISING A PLURALITY OF JUXTAPOSED CO-AXIALLY ARRANGED RADIALLY EXPANSIBLE AND CONTRACTIBLE DIE UNITS CORRESPONDING IN NUMBER TO THE BEADS TO BE FORMED, EACH OF SAID DIE UNITS COMPRISISNG A SET OF RADIALLY MOVABLE DIE SEGMENTS, A SINGLE LONGITUDINALLY SHIFTABLE ACTUATOR COMPLETELY MOVABLE THROUGH EACH OF SAID DIE UNITS DURING A POWER STROKE, SAID ACTUATOR INCLUDING MEANS FOR FORCIBLY EXPANDING SAID DIE UNIT IN SUCCESSION AND HOLDING AT LEAST ONE ALREADY EXPANDED DIE UNIT IN EXPANDING POSITION WHILE EXPANDING THE NEXT ADJACENT DIE UNIT, AND MEANS FOR CONTRACTING EACH OF ASID DIE UNITS AFTER IT HAS BEEN RELEASED BY SAID ACTUATOR.
References Cited (Backward Citations)
US1939065A
Cited
GB444331A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |