US3283377A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine wheel manufacturing method
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1964-06-29
•
Granted: 1966-11-08
•
Expires: 1984-06-29
Abstract
No abstract record available.
Inventors
- 👤 George D Chandley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:06
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/34; B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22D; B22D27/00; B22D27/04; B22D27/045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
THE METHOD OF MAKING A TURBINE WHEEL WHICH COMPRISES POSITIONING A CERAMIC SHELL MOLD ON A HEAT ABSTRACTING SURFACE IN A FURNACE ENCLOSURE, SAID MOLD HAVING COMMUNICATING MOLDING CAVITIES DEFINING A HUB SECTION, A WHEEL PORTION EXTENDING ANNULARLY ABOUT SAID HUB SECTION, AND VANES EXTENDING RADIALLY OUTWARDLY FROM SAID WHEEL PORTION, RADIATING THERMAL ENERGY AT SAID MOLD, SHIELDING A SUBSTANTIAL PORTION OF THE CAVITY DEFINING SAID HUB SECTION FROM THE RADIATION, CONTINUING THE HEATING UNTIL THE PORTIONS OF THE MOLD IN WHICH THE THICKNESS DIMENSIONS OF THE CAVITIES IS THE SMALLEST ACHIEVE TEMPERATURES ON THE ORDER OF THE POURING TEMPERATURE OF THE ALLOY TO BE CAST, CASTING A MOLTEN ALLOY INTO SAID MOLD AT A TEMPERATURE NOT MORE THAN 200*F. ABOVE ITS LIQUIDUS TEMPERATURE, AND COOLING THE RESULTING CASTING IN SAID MOLD TO PRODUCE A CAST TURBINE WHEEL HAVING A HUB SECTION WITH A RELATIVELY LARGE GRAIN SIZE, VANES WITH A RELATIVELY FINE GRAIN SIZE, AND A WHEEL PORTION WITH A GRAIN SIZE INTERMEDIATE THAT OF SAID HUB SECTION AND SAID VANES.
Claim 2
Independent Claim
172 words
THE METHOD OF MAKING A TURBINE WHEEL WHICH COMPRISES POSITIONING A CERAMIC SHELL MOLD ON A HEAT ABSTRACTING SURFACE IN A FURNACE ENCLOSURE, SAID MOLD HAVING COMMUNICATING MOLDING CAVITIES DEFINING A HUB SECTION, A WHEEL PORTION EXTENDING ANNULARLY ABOUT SAID HUB SECTION, AND VANES EXTENDING RADIALLY OUTWARDLY FROM SAID WHEEL PORTION, RADIATING THERMAL ENERGY AT SAID MOLD, SHIELDING A SUBSTANTIAL PORTION OF THE CAVITY DEFINING SAID HUB SECTION FROM THE RADIATION, CONTINUING THE HEATING UNTIL THE PORTIONS OF THE MOLD IN WHICH THE THICKNESS DIMENSIONS OF THE CAVITIES IS THE SMALLEST ACHIEVE TEMPERATURES ON THE ORDER OF THE POURING TEMPERATURE OF THE ALLOY TO BE CAST, CASTING A MOLTEN ALLOY INTO SAID MOLD AT A TEMPERATURE NOT MORE THAN 200*F. ABOVE ITS LIQUIDUS TEMPERATURE, AND COOLING THE RESULTING CASTING IN SAID MOLD TO PRODUCE A CAST TURBINE WHEEL HAVING A HUB SECTION WITH A RELATIVELY LARGE GRAIN SIZE, VANES WITH A RELATIVELY FINE GRAIN SIZE, AND A WHEEL PORTION WITH A GRAIN SIZE INTERMEDIATE THAT OF SAID HUB SECTION AND SAID VANES.
References Cited (Backward Citations)
US1417638A
Cited
US1556642A
Cited
US2045576A
Cited
US2302030A
Cited
US2922619A
Cited
US2888244A
Cited
US2892224A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |