US3383891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Superhydraulic forging method and apparatus
Assignee: Individual
•
Filing: 1965-10-20
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Granted: 1968-05-21
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Expires: 1985-10-20
Abstract
No abstract record available.
Inventors
- 👤 Robert C Geitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:32
CPC Classifications
B; B21; B21J; B21J5/00; B21J5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A CLOSED DIE COLD FORGING OPERATION WHEREIN A METALLIC SHAPE IS FORMED BY SQUEEZING A METAL BILLET BETWEEN DIES WHICH DEFINE A DIE CAVITY, COMPRISING THE STEPS OF SURROUNDING THE BILLET WITH A FLUID, INCREASING THE PRESSURE OF THE FLUID SURROUNDING THE BILLET TO A HIGH VALUE WHERE THE DUCTIBILITY OF THE METAL OF THE BILLET IS SUBSTANTIALLY INCREASED, WHILE THUS SUBJECTED TO THIS HIGH PRESSURE SUBJECTING THE BILLET TO THE ACTION OF THE DIES TO CAUSE METAL OF THE BILLET TO OCCUPY AND CONFORM TO THE DIE CAVITY, THEREAFTER REDUCING SAID PRESSURE TO A VALUE WHERE IT HAS SUBSTANTIALLY NO EFFECT ON THE DUCTIBILITY OF THE FORMED METAL AND NOT BEFORE SUCH PRESSURE REDUCTION RELEASING THE DIE PORTIONS TO PERMIT REMOVAL OF THE FORGING.
Claim 2
Dependent Claim
125 words
A CLOSED DIE COLD FORGING OPERATION WHEREIN A METALLIC SHAPE IS FORMED BY SQUEEZING A METAL BILLET BETWEEN DIES WHICH DEFINE A DIE CAVITY, COMPRISING THE STEPS OF SURROUNDING THE BILLET WITH A FLUID, INCREASING THE PRESSURE OF THE FLUID SURROUNDING THE BILLET TO A HIGH VALUE WHERE THE DUCTIBILITY OF THE METAL OF THE BILLET IS SUBSTANTIALLY INCREASED, WHILE THUS SUBJECTED TO THIS HIGH PRESSURE SUBJECTING THE BILLET TO THE ACTION OF THE DIES TO CAUSE METAL OF THE BILLET TO OCCUPY AND CONFORM TO THE DIE CAVITY, THEREAFTER REDUCING SAID PRESSURE TO A VALUE WHERE IT HAS SUBSTANTIALLY NO EFFECT ON THE DUCTIBILITY OF THE FORMED METAL AND NOT BEFORE SUCH PRESSURE REDUCTION RELEASING THE DIE PORTIONS TO PERMIT REMOVAL OF THE FORGING.
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) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |