US3672787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine blade having a cooled laminated skin
Assignee: Avco Corp
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Filing: 1969-10-31
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Granted: 1972-06-27
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Expires: 1989-10-31
Abstract
Abstract A TURBINE BLADE IS COMPRISED OF A CORE HAVING OPEN TROUGHS ENCLOSED BY A LAMINATED SKIN TO FORM COOLANT PASSAGES. EACH LAYER OF THE LAMINATED SKIN HAS COOPERATING CAVITIES WHICH PROVIDE COOLANT FLOW PASSAGE THROUGH THE SKIN. THIS RESULTS IN THE COMBINATION OF CONVECTION COOLING WITHIN THE MULTI-LAYERED LAMINATED SKIN, AND BOUNDARY LAYER COOLING ON THE SURFACE OF THE TURBINE BLADE.
Inventors
- 👤 Rolf A Thorstenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:16
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/184; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/204
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |