Patent US3700418A successfully refreshed from Google Patents.
US3700418A
Expired / Lapsed
US
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Cooled airfoil and method of making it
Assignee: Motors Liquidation Co
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Filing: 1969-11-24
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Granted: 1972-10-24
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Expires: 1989-11-24
Abstract
Abstract A TRANSPIRATION-COOLED TURBINE VANE OR THE LIKE HAS NUMEROUS PORES FOR EMISSION OF AIR FROM THE VANE FOR TRANSPIRATION COOLING. THESE PORES ARE PROCUCED BY PHOTOETCHING PITS FROM THE OUTER AND INNER FACES OF THE OUTER METAL LAYER OF THE VANE WALL, THE PITS BEING OFFSET SO THAT THEIR INTERSECTION HAS AN AXIS AT AN ACUTE ANGLE TO THE SURFACE OF THE VANE, WITH THE RESULT THAT THE AIR EMITTED FLOWS GENERALLY WITH THE DIRECTION OF FLOW PAST THE VANE RATHER THAN TRANSVERSE TO THE DIRECTION OF FLOW.
Inventors
- 👤 Thomas H Mayeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:14
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/183; F01D5/184; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49341; Y10T29/496; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12389; Y10T428/12479
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |