US4257737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooled rotor blade
Assignee: RTX Corp
•
Filing: 1978-07-10
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Granted: 1981-03-24
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Expires: 1998-07-10
Abstract
Abstract A cooled rotor blade is constructed having a cooling passage extending from the root and through the airfoil shaped section in a serpentine fashion, making several passes between the bottom and top thereof; a plurality of openings connect said cooling passage to the trailing edge; a plurality of compartments are formed lengthwise behind the leading edge of the blade; said compartments having openings extending through to the exterior forward portion of the blade; and sized openings connect the cooling passage to each of the compartments to control the pressure in each compartment.
Inventors
- 👤 Dale E. Andress
- 👤 Douglas H. Clevenger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F05; F05D; F05D2260/00; F05D2260/20; F05D2260/221; F05D2260/2212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A cooled rotor blade having an airfoil shaped section and a root section including, a cooling passage extending from the root section into the airfoil shaped section, a plurality of compartments being located lengthwise in line in a radial direction behind only the leading edge of the blade, each compartment having cooling openings extending through the leading edge to the exterior of the airfoil shaped section of the blade to achieve a desired pattern of cooling, adjacent lengthwise compartments having a common wall, a sized opening connecting the cooling passage to each of the compartments to control the pressure in each compartment, each sized opening being located at the bottom of its lengthwise compartment.
Claim 2
Dependent Claim
114 words
A cooled rotor blade having an airfoil shaped section and a root section including, a cooling passage extending from the root section into the airfoil shaped section, a plurality of compartments being located lengthwise in line in a radial direction behind only the leading edge of the blade, each compartment having cooling openings extending through the leading edge to the exterior of the airfoil shaped section of the blade to achieve a desired pattern of cooling, adjacent lengthwise compartments having a common wall, a sized opening connecting the cooling passage to each of the compartments to control the pressure in each compartment, each sized opening being located at the bottom of its lengthwise compartment.
References Cited (Backward Citations)
US3370829A
Cited
US3528751A
Cited
US3533711A
Cited
US3628885A
Cited
US3644059A
Cited
US3799696A
Cited
SU364747A1
Cited
US3891348A
Cited
US3930748A
Cited
US4162136A
Cited
US4019831A
Cited
US4026659A
Cited
US4073599A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |