US5267834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bucket for the last stage of a steam turbine
Assignee: General Electric Co
•
Filing: 1992-12-30
•
Granted: 1993-12-07
•
Expires: 2012-12-30
Abstract
Abstract A last-stage steam turbine bucket having a profile according to Charts II-XIII, XV-XXVII and XXIX of Table I.
Inventors
- 👤 Cuong V. Dinh
- 👤 Stephen G. Ruggles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:28
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F01D5/22; F05; F05D; F05D2240/00; F05D2240/20; F05D2240/30; F05D2240/301; Y; Y10; Y10S; Y10S416/00; Y10S416/02
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
21 words
A bucket for a steam turbine having a profile in accordance with Charts II-XIII, XV-XXVlI and XXIX inclusive of Table I.
Claim 2
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with Charts II-XIII, XV-XXVlI and XXIX inclusive of Table I.
Claim 3
Dependent Claim
36 words
A plurality of buckets constructed in accordance with claim 1 spaced circumferentially about an axis of a turbine wheel and having tips, and means for continuously coupling said tips one to the other about said axis.
Claim 4
Dependent Claim
44 words
The buckets according to claim 2 wherein said coupling means includes a tip trapezoid for each bucket and a cover intermediate the tip trapezoid of next adjacent bucket tips, and means for connecting the tip trapezoid and the intermediate covers one to the other.
Claim 5
Dependent Claim
33 words
A plurality of buckets according to claim 3 including a sealing rib projecting radially from each said tip trapezoid and intermediate cover forming an annular sealing ring about the tips of said buckets.
Claim 6
Dependent Claim
25 words
A bucket according to claim 4, wherein said connecting means between adjacent tip trapezoid and intermediate covers is loose, enabling relative movement between adjacent buckets.
Claim 7
Dependent Claim
61 words
A bucket according to claim 3, wherein said connecting means includes a first loose connection between each said tip trapezoid and an adjacent intermediate cover in one direction about the turbine wheel enabling relative movement between adjacent buckets and a second rigid connection between each said tip trapezoid and an adjacent intermediate cover in the opposite direction about the turbine wheel.
Claim 8
Dependent Claim
60 words
A bucket according to claim 6, wherein said first connection includes an opening in each said tip trapezoid and a tenon carried by an adjacent intermediate cover for reception in said opening, said second connection including an opening in each said tip trapezoid and a tenon carried by another next adjacent intermediate cover for reception in said second connection opening.
Claim 9
Dependent Claim
25 words
A bucket according to claim 2 including means along intermediate portions of the lengths of aid buckets for loosely coupling adjacent buckets one to another.
Claim 10
Dependent Claim
29 words
A bucket according to claim 8 wherein said coupling means includes projections on opposite sides of each bucket and a sleeve between each bucket and engageable with said projections.
Claim 11
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with the Charts II-XIII and XVI-XXVII inclusive of Table I.
Claim 12
Dependent Claim
21 words
A bucket for a steam turbine having a profile in accordance with the Charts II-XIII and XVI-XXVII inclusive of Table I.
Claim 13
Dependent Claim
14 words
A bucket according to claim 10 having a profile in accordance with Chart XV.
Claim 14
Dependent Claim
14 words
A bucket according to claim 10 having a profile in accordance with Chart XXIX.
Claim 15
Dependent Claim
16 words
A bucket according to claim 10 having a profile in accordance with Charts XV and XXIX.
Claim 16
Dependent Claim
14 words
A bucket according to claim 10 having a profile in accordance with Chart I.
Claim 17
Dependent Claim
14 words
A bucket according to claim 14 having a profile in accordance with Chart XV.
Claim 18
Dependent Claim
14 words
A bucket according to claim 14 having a profile in accordance with Chart XXIX.
Claim 19
Dependent Claim
20 words
A bucket for a steam turbine having a profile in accordance with Charts I-XIV and XVI-XXVIII inclusive of Table I.
Claim 20
Dependent Claim
20 words
A bucket for a steam turbine having a profile in accordance with Charts I-XIV and XVI-XXVIII inclusive of Table I.
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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) | 1996-12-06 | 1997-06-07 | 1997-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-12-06 | 2001-06-07 | 2001-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-12-06 | 2005-06-07 | 2005-12-07 | $7700.00 | Window Closed / Lapsed |