Patent US5419040A successfully refreshed from Google Patents.
US5419040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow fan blade fabrication
Assignee: Ford Global Technologies LLC
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Filing: 1994-04-29
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Granted: 1995-05-30
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Expires: 2014-04-29
Abstract
Abstract Purge flow openings through chordwise ribs in hollow fan blades are formed by making partial circular cuts at the rib edges before diffusion bonding the blade halves. A full semi-circular section is used on the pressure side, but only a segment of a semicircular section is used on the suction side.
Inventors
- 👤 Michael A. Weisse
- 👤 David B. Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:58
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; B; B23; B23P; B23P15/00; B23P15/04; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49826; Y10T29/49893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
156 words
A method of forming a hollow fan blade having both longitudinal and cordial internal ribs connecting the pressure side and the suction side comprising: forming a suction side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal fibs; forming a pressure side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming connecting openings through said longitudinal ribs at a location to enable a sinuous flowpath through the channels between said longitudinal ribs; forming at the edges of each cordwise rib section of said pressure side a semi-circular hole of radius r and depth r; forming at the edge of each cordwise rib section of said suction side a segment of radius r and a depth of between 0.2 r and 0.5 r; diffusion bonding said blade halves together with said semi-circular holes and said segments in registrations; and forming said bonded blade into an airfoil shape.
Claim 2
Independent Claim
156 words
A method of forming a hollow fan blade having both longitudinal and cordial internal ribs connecting the pressure side and the suction side comprising: forming a suction side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal fibs; forming a pressure side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming connecting openings through said longitudinal ribs at a location to enable a sinuous flowpath through the channels between said longitudinal ribs; forming at the edges of each cordwise rib section of said pressure side a semi-circular hole of radius r and depth r; forming at the edge of each cordwise rib section of said suction side a segment of radius r and a depth of between 0.2 r and 0.5 r; diffusion bonding said blade halves together with said semi-circular holes and said segments in registrations; and forming said bonded blade into an airfoil shape.
Claim 3
Independent Claim
155 words
A method of forming a hollow fan blade having both longitudinal and cordial internal ribs connecting the pressure side and the suction side comprising: forming a suction side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming a pressure side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming connecting openings through said longitudinal ribs at a location to enable a sinuous flowpath through the channels between said longitudinal ribs; forming at the edges of each cordwise rib section of said pressure side a semi-circular hole of radius r and depth r; forming at the edge of each cordwise rib section of said suction side a segment of radius r and a depth of between 0.3r and 0.4 r; diffusion bonding said blade halves together with said semi-circular holes and said segments in registrations; and forming said bonded blade into an airfoil shape.
Claim 4
Independent Claim
155 words
A method of forming a hollow fan blade having both longitudinal and cordial internal ribs connecting the pressure side and the suction side comprising: forming a suction side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming a pressure side blade half with internal longitudinal ribs and cordwise rib sections between adjacent longitudinal ribs; forming connecting openings through said longitudinal ribs at a location to enable a sinuous flowpath through the channels between said longitudinal ribs; forming at the edges of each cordwise rib section of said pressure side a semi-circular hole of radius r and depth r; forming at the edge of each cordwise rib section of said suction side a segment of radius r and a depth of between 0.3r and 0.4 r; diffusion bonding said blade halves together with said semi-circular holes and said segments in registrations; and forming said bonded blade into an airfoil shape.
References Cited (Backward Citations)
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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) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |