Patent US5299915A successfully refreshed from Google Patents.
US5299915A
Expired / Lapsed
US
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Bucket for the last stage of a steam turbine
Assignee: General Electric Co
•
Filing: 1992-07-15
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Granted: 1994-04-05
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Expires: 2012-07-15
Abstract
Abstract A last-stage steam turbine bucket having a profile according to Charts I-XXXXI of Table I. The bucket is divided into a number of profile sections each of which is a predetermined radial distance from the root section. Each point on a profile section at the predetermined radial distance from the root is defined by an X-Y coordinate and a radius R along the arc of a circle connecting adjacent points.
Inventors
- 👤 Cuong V. Dinh
- 👤 Steven G. Ruggles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:23
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/22; F01D5/24; F01D5/14; F01D5/141; F01D5/225; F01D5/30; F01D5/3023; Y; Y10; Y10S; Y10S416/00; Y10S416/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
21 words
A bucket for a steam turbine having a profile in accordance with Charts I-XIX; XXI-XXXIX; and XLI inclusive of Table I.
Claim 2
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with Charts I-XIX; XXI-XXXIX; and XLI inclusive of Table I.
Claim 3
Dependent Claim
18 words
The bucket according to claim 1 having a theoretical aerodynamic profile according to Chart XX of Table I.
Claim 4
Dependent Claim
18 words
The bucket according to claim 1 having a theoretical aerodynamic profile according to Chart XL of Table I.
Claim 5
Dependent Claim
18 words
The bucket according to claim 3 having a theoretical aerodynamic profile according to Chart XX of Table I.
Claim 6
Dependent Claim
32 words
A plurality of buckets constructed in accordance with claim 1 spaced circumferentially about an axis and having tips, and means for continuously coupling said tips one to the other about said axis.
Claim 7
Dependent Claim
52 words
The buckets according to claim 5 including a plurality of inner covers connecting the tips of adjacent pairs of buckets one to the other and a plurality of outer covers connecting adjacent ones of adjacent pairs of said buckets one to the other and in radially overlying relation to said inner covers.
Claim 8
Dependent Claim
29 words
A plurality of buckets according to claim 6 including a sealing rib projecting radially from said outer covers forming an annular sealing ring about the tips of said buckets.
Claim 9
Dependent Claim
30 words
A bucket according to claim 1 wherein said bucket has a root connected to a dovetail, said dovetail having a projection and a corresponding recess on circumferentially opposite sides thereof.
Claim 10
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with the Charts I-XVIII; and XX-XL inclusive of Table 1.
Claim 11
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with the Charts I-XVIII; and XX-XL inclusive of Table 1.
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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) | 1997-04-04 | 1997-10-04 | 1998-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-04 | 2001-10-04 | 2002-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-04 | 2005-10-04 | 2006-04-05 | $7700.00 | Window Closed / Lapsed |