US3633264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Isostatic forging
Assignee: Battelle Development Corp
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Filing: 1969-11-03
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Granted: 1972-01-11
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Expires: 1989-11-03
Abstract
Abstract A process for forging hollow bodies comprising preforming the hollow body, sealing the internal cavity of the body, applying isostatic fluid pressure to the interior and exterior surfaces of the body prior to final deformation, and increasing the pressure on one of the surfaces relative to the opposing surface to plastically deform the body to predetermined dimensions.
Inventors
- 👤 Paul J Gripshover
- 👤 Charles B Boyer
- 👤 George H Harth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:22
CPC Classifications
B; B21; B21D; B21D26/00; B21D26/02; B21D26/021; B21D26/029; B21D26/033; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A process for forging hollow bodies comprising the steps of preforming the hollow body of substantially the same shape as the desired finished product; sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deformation; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein said preformed hollow body comprises metal particles compacted in an evacuated, flexible container and said body is subjected to the differential isostatic pressure at temperature and for time requisite to compact, deforM, and metallurgically bond said metal particles into a forged shape.
Claim 2
Dependent Claim
120 words
A process for forging hollow bodies comprising the steps of preforming the hollow body of substantially the same shape as the desired finished product; sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deformation; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein said preformed hollow body comprises metal particles compacted in an evacuated, flexible container and said body is subjected to the differential isostatic pressure at temperature and for time requisite to compact, deforM, and metallurgically bond said metal particles into a forged shape.
Claim 3
Dependent Claim
100 words
A process for forging hollow bodies comprising the steps of preforming a hollow body of substantially the same shape as the desired finished product: sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deformation; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein the isostatic pressure on the exterior surfaces is increased to reduce the exterior dimensions and thicken the walls of said preform body.
Claim 4
Dependent Claim
100 words
A process for forging hollow bodies comprising the steps of preforming a hollow body of substantially the same shape as the desired finished product: sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deformation; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein the isostatic pressure on the exterior surfaces is increased to reduce the exterior dimensions and thicken the walls of said preform body.
Claim 5
Dependent Claim
88 words
A process for forging hollow bodies comprising the steps of preforming a hollow body of substantially the same shape as the desired finished product; sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deterioration; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein the external pressure is applied within a high-pressure gas autoclave.
Claim 6
Dependent Claim
88 words
A process for forging hollow bodies comprising the steps of preforming a hollow body of substantially the same shape as the desired finished product; sealing the internal cavity of said preformed body; applying isostatic fluid pressure simultaneously to the interior and exterior surfaces of said preformed body prior to final deterioration; and increasing the pressure on one of said surfaces relative to the pressure on the opposing surface to plastically deform said preformed body to predetermined dimensions; wherein the external pressure is applied within a high-pressure gas autoclave.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |