US3697192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow turbine blade
Assignee: RTX Corp
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Filing: 1970-05-07
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Granted: 1972-10-10
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Expires: 1990-05-07
Abstract
Abstract A hollow cooled gas turbine blade is made by forming an insert with a hollow airfoil and a hollow root portion and with lateral cooling air passages extending through the wall of the airfoil and positioning the insert in a hollow main blade having an airfoil portion and a notch in the root to receive the root portion of the insert with both root portions having aligned serrations on opposite surfaces for supporting the blade and the insert in a turbine disk.
Inventors
- 👤 Charles W Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:21
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/02; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/188; F01D5/189
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A gas turbine blade construction including a main blade having a main root portion with blade attachment means on opposite sides thereof and with a transverse groove extending entirely across the root portion and an integral airfoil portion projecting from said root portion, and an insert within said main blade, said insert including an insert airfoil portion within and spaced laterally from said main blade airfoil portion and an insert root portion to which said airfoil portion is attached, said insert root portion extending transversely across said main root portion and fitting in the transverse groove therein, said insert having blade attachments means thereon in alignment with those on the main root, said insert root portion supporting the insert airfoil portion within and in spaced relation to the blade airfoil portion.
Claim 2
Dependent Claim
131 words
A gas turbine blade construction including a main blade having a main root portion with blade attachment means on opposite sides thereof and with a transverse groove extending entirely across the root portion and an integral airfoil portion projecting from said root portion, and an insert within said main blade, said insert including an insert airfoil portion within and spaced laterally from said main blade airfoil portion and an insert root portion to which said airfoil portion is attached, said insert root portion extending transversely across said main root portion and fitting in the transverse groove therein, said insert having blade attachments means thereon in alignment with those on the main root, said insert root portion supporting the insert airfoil portion within and in spaced relation to the blade airfoil portion.
Claim 3
Dependent Claim
39 words
A blade construction as in claim 1 in which the insert has a passage extending longitudinally thereof, including the insert root portion, and lateral passages positioned transversely in said insert air foil portion and communicating with the longitudinal passage.
Claim 4
Dependent Claim
40 words
A bladE construction as in claim 2 in which the airfoil portion of the insert is hollow and the passage in the insert root portion of the insert communicates from said hollow airfoil portion to the base of the root.
References Cited (Backward Citations)
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US2780435A
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US2848192A
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US2851216A
Cited
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US3014270A
Cited
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Cited
US3542486A
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |