Patent US4441126A successfully refreshed from Google Patents.
US4627480A
Expired / Lapsed
US
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Angled turbulence promoter
Assignee: General Electric Co
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Filing: 1985-01-29
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Granted: 1986-12-09
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Expires: 2005-01-29
Abstract
Abstract A ceramic core for use in the casting of a hollow turbine blade comprising at least one passage core portion with first and second opposite surfaces. A plurality of first grooves are disposed on the first surface at a first angle with respect to the centerline of the first surface. A plurality of second grooves are disposed on the second surface at a second angle with respect to the centerline of the second surface. The first angle is less than 90° and the second angle is greater than 90°.
Inventors
- 👤 Ching-Pang Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:03
CPC Classifications
B; B22; B22C; B22C9/00; B22C9/02; B22C9/04; B22C9/10; B22C9/103; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/25; F05D2260/00; F05D2260/20; F05D2260/221; F05D2260/2212
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A ceramic core for use in the casting of a hollow turbine blade comprising at least one passage core portion with first and second opposite surfaces, wherein: a plurality of first grooves are disposed on said first surface at a first angle with respect to the center line of said first surface; and a plurality of second grooves are disposed on said second surface at a second angle with respect to the center line of said second surface; said first angle being less than 90° and said second angle being greater than 90°.
Claim 2
Dependent Claim
93 words
A ceramic core for use in the casting of a hollow turbine blade comprising at least one passage core portion with first and second opposite surfaces, wherein: a plurality of first grooves are disposed on said first surface at a first angle with respect to the center line of said first surface; and a plurality of second grooves are disposed on said second surface at a second angle with respect to the center line of said second surface; said first angle being less than 90° and said second angle being greater than 90°.
Claim 3
Dependent Claim
21 words
A core, as recited in claim 1, wherein each of said grooves is interrupted by a wall integral with said surface.
Claim 4
Dependent Claim
19 words
A core, as recited in claim 2, wherein said first angle is 60° and said second angle is 120°.
Claim 5
Dependent Claim
98 words
A ceramic core for use in the casting of a hollow turbine blade comprising at least one passage core portion with first and second opposite surfaces with a plurality of first and second hole arrays disposed therein, wherein: each of said first and second hole arrays comprises a plurality of non-abutting aligned holes; each of said first hole arrays is positioned at a first angle with respect to the center line of said first surface; and each of said second hole arrays is positioned at a second angle with respect to the center line of said second surface.
Claim 6
Dependent Claim
98 words
A ceramic core for use in the casting of a hollow turbine blade comprising at least one passage core portion with first and second opposite surfaces with a plurality of first and second hole arrays disposed therein, wherein: each of said first and second hole arrays comprises a plurality of non-abutting aligned holes; each of said first hole arrays is positioned at a first angle with respect to the center line of said first surface; and each of said second hole arrays is positioned at a second angle with respect to the center line of said second surface.
References Cited (Backward Citations)
US4257737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-08 | 1990-06-09 | 1990-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-08 | 1994-06-09 | 1994-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-08 | 1998-06-09 | 1998-12-09 | $7700.00 | Window Closed / Lapsed |