US3228073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for making metal forgings
Assignee: IMP Eastman Corp
•
Filing: 1961-09-01
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Granted: 1966-01-11
•
Expires: 1981-09-01
Abstract
No abstract record available.
Inventors
- 👤 Harrison George
- 👤 Nelson K Harrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
B; B22; B22D; B22D18/00; B22D18/02; B22D18/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD WHICH COMPRISES FLOWING LIQUID METAL INTO A CLOSED MOLD FROM THE BOTTOM THEREOF WITHOUT TURBULENCE FROM A SOURCE OF LIQUID METAL WHICH IS UNDER PRESSURE THAT IS GREATER THAN THE PRESSURE IN THE MOLD, AND CONTROLLING THE RATE OF MOVEMENT OF AIR OUT OF THE MOLD TO CONTROL THE RATE OF FLOW OF METAL INTO THE MOLD, UPON FILLING OF THE MOLD INCREASING THE DIFFERENCE BETWEEN THE PRESSURE IN THE MOLD AND THE PRESSURE ON SAID SOURCE OF LIQUID, ALLOWING THE METAL TO SOLIDIFY IN THE MOLD, AND WHILE THE SOLIDIFIED METAL IS STILL HOT IN THE MOLD APPLYING PRESSURE THERETO TO CAUSE THE SOLID METAL THEREOF TO FLOW AND CHANGE THE SHAPE OF THE SOLIFIED METAL.
Claim 2
Independent Claim
119 words
A METHOD WHICH COMPRISES FLOWING LIQUID METAL INTO A CLOSED MOLD FROM THE BOTTOM THEREOF WITHOUT TURBULENCE FROM A SOURCE OF LIQUID METAL WHICH IS UNDER PRESSURE THAT IS GREATER THAN THE PRESSURE IN THE MOLD, AND CONTROLLING THE RATE OF MOVEMENT OF AIR OUT OF THE MOLD TO CONTROL THE RATE OF FLOW OF METAL INTO THE MOLD, UPON FILLING OF THE MOLD INCREASING THE DIFFERENCE BETWEEN THE PRESSURE IN THE MOLD AND THE PRESSURE ON SAID SOURCE OF LIQUID, ALLOWING THE METAL TO SOLIDIFY IN THE MOLD, AND WHILE THE SOLIDIFIED METAL IS STILL HOT IN THE MOLD APPLYING PRESSURE THERETO TO CAUSE THE SOLID METAL THEREOF TO FLOW AND CHANGE THE SHAPE OF THE SOLIFIED METAL.
References Cited (Backward Citations)
US1222786A
Cited
US1458294A
Cited
US1912965A
Cited
US2112342A
Cited
US2181157A
Cited
US2396108A
Cited
US2726560A
Cited
US2821757A
Cited
US2852822A
Cited
US2864140A
Cited
US3070857A
Cited
US3078528A
Cited
US3120038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |