US4265594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine blade having heat localization segments
Assignee: BBC BROWN BOVERI and Co Ltd
•
Filing: 1979-02-28
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Granted: 1981-05-05
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Expires: 1999-02-28
Abstract
Abstract Turbine blades having heat localization segments, especially for use in gas turbines, are disclosed. The segments are provided with covering elements in the form of thin cover plates that are supported against the blade root. The segments are formed as one piece together with both the actual blade and with reinforcing elements. The segments are used to impede access of a hot working medium to the turbine rotor.
Inventors
- 👤 Jean Eggmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:23
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D11/00; F01D11/001; F01D5/02; F01D5/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
120 words
A blade for a turbine section, of a gas turbine, comprising: a blade root; a blade member extending directly from the blade root; first and second heat localization segments including first and second covering elements respectively, the first and second covering elements being formed as one piece with the blade member and the blade root, said covering elements impeding access of a working medium to a rotor of the turbine; each covering element including a cover plate and supporting means for stiffening the cover plate, a portion of the cover plate adjacent the blade member and blade root being angled toward the blade member, said supporting means connecting the cover plate to an axial end face of the blade root.
Claim 2
Dependent Claim
120 words
A blade for a turbine section, of a gas turbine, comprising: a blade root; a blade member extending directly from the blade root; first and second heat localization segments including first and second covering elements respectively, the first and second covering elements being formed as one piece with the blade member and the blade root, said covering elements impeding access of a working medium to a rotor of the turbine; each covering element including a cover plate and supporting means for stiffening the cover plate, a portion of the cover plate adjacent the blade member and blade root being angled toward the blade member, said supporting means connecting the cover plate to an axial end face of the blade root.
Claim 3
Dependent Claim
14 words
The blade of claim 1 wherein the supporting means includes first and second braces.
Claim 4
Dependent Claim
16 words
The blade of claim 1 wherein the supporting means includes first and second triangular shaped ribs.
Claim 5
Dependent Claim
27 words
The blade of claim 1 wherein the supporting means includes a bracket plate and an intermediate brace connecting the bracket plate with one of the cover plates.
Claim 6
Dependent Claim
29 words
The blade of claim 1 wherein the first and second covering elements each include slot means for receiving a sealing strip to seal an expansion joint between adjacent blades.
Claim 7
Dependent Claim
21 words
The blade of claim 1 wherein the first and second covering elements are each provided with at least one sealing ridge.
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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) | 1984-05-04 | 1984-11-03 | 1985-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-04 | 1988-11-03 | 1989-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-04 | 1992-11-03 | 1993-05-05 | $7700.00 | Window Closed / Lapsed |