Gas turbine blade
Abstract
Abstract AN IMPROVED TRANSPIRATION COOLED TURBINE BLADE COMPRISING A SHEATH OF PERMEABLE MATERIAL SURROUNDING A LOAD-CARRYING STRUT, THE ASSEMBLY HAVING A GENERALLY AIRFOIL CONFIGURATION WITH A CONCAVE AND CONVEX SURFACE JOINED BY A CURVED LEADING EDGE PORTION AND A TRAILING EDGE PORTION. THE STRUT IS PROVIDED WITH LANDS AND GROOVES WITH A LAND PORTION EXTENDING INTO ABUTMENT AGAINST THE SHEATH TO THEREBY REINFORCE THE SHEATH AGAINST IMPACTION OF GAS ENTRAINED PARTICLES. THE LAND PORTION IS OFFSET FROM AN IMAGINARY LONGITUDINAL PLANE CONTAINING THE CHAMBER LINE IN A DIRECTION AWAY FROM THE CONCAVE SURFACE OF THE BLADE SO THAT COOLING FLUID CAN BLEED THROUGH THE SHEATH AT THE LEADING EDGE PORTION ON BOTH SIDES OF THE IMAGINARY LONGITUDINAL PLANE.
Inventors
- 👤 Angelo De Feo
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |