US3790303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine bucket
Assignee: BBC Brown Boveri AG Switzerland
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Filing: 1972-04-05
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Granted: 1974-02-05
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Expires: 1992-04-05
Abstract
Abstract In a gas turbine bucket, having a blade and a root, composed of a eutectic alloy the blade is reinforced by eutectic fibers disposed in grain-orientated form, whilst in the root of the bucket the structure is non-orientated and enjoys a desirably high impact strength and ductility.
Inventors
- 👤 W Endres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:17
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
38 words
Gas turbine bucket according to claim 1, in the blade of which crystals embedded in matrix are present as fibers disposed longitudinally in parallel to the blade and extend through the blade and to the root per se.
Claim 2
Dependent Claim
39 words
Gas turbine bucket according to claim 1, in which the eutectic alloy is a member of the group of alloys consisting of Co-Cr-C, Nb-Nb2C, Ta-Ta2C, Ni-Ni3Nb, Ni-Ni3Ti, NiAl-Cr, Co-TiC, Ni-TaC, Co-VC, NiAl-Ni3Nb, Ni3-Al-Ni3Ta, Co1 x-Crx-TaC, Co-TaC, and Ni1 x-Crx-TaC.
Claim 3
Dependent Claim
30 words
Gas turbine bucket according to claim 3, wherein the alloy is a Co-Cr-C alloy consisting essentially of 56.1 wt. percent cobalt, 40 wt. percent chromium and 2.4 wt. percent carbon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |