US5013216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite blade perform with divergent root
Assignee: Turbine Engine Components Textron Inc
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Filing: 1989-11-29
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Granted: 1991-05-07
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Expires: 2009-11-29
Abstract
Abstract A braided gas turbine engine blade preform includes an airfoil precursor portion and an integral root precursor portion. A plurality of fiber shaping inserts are disposed in the root precursor portion, to impart an enlarged, divergent shape (e.g., dovetail precursor shape) to the braided root precursor portion. The braided preform with the enlarged, shaped root precursor portion is infiltrated with matrix material and shaped to near net shape to provide a composite blade with a dovetail shaped root.
Inventors
- 👤 Carlos Bailey
- 👤 Raymond G. Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:29
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/06; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; D10; D10B; D10B2505/00; D10B2505/02; F05; F05D; F05D2250/00; F05D2250/30; F05D2250/32; F05D2250/324; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
50 words
A gas turbine engine blade preform comprising a 3D braided fiber preform having an airfoil precursor portion and an integral root precursor portion, said root precursor portion having a plurality of fiber inserts extending chordwise of the blade therein to impart an enlarged, divergent shape to said root precursor portion.
Claim 2
Dependent Claim
50 words
A gas turbine engine blade preform comprising a 3D braided fiber preform having an airfoil precursor portion and an integral root precursor portion, said root precursor portion having a plurality of fiber inserts extending chordwise of the blade therein to impart an enlarged, divergent shape to said root precursor portion.
Claim 3
Dependent Claim
13 words
The preform of claim 1 wherein said fiber inserts comprise braided fiber inserts
Claim 4
Dependent Claim
13 words
The preform of claim 1 wherein said fiber inserts comprise uniaxial fiber inserts.
Claim 5
Dependent Claim
14 words
The preform of claim 3 wherein uniaxial fiber inserts are overwrapped by helical fibers.
Claim 6
Dependent Claim
27 words
The preform of claim 1 wherein said inserts are spaced apart in a pattern in the chordwise direction to impart a dovetail shape to the braided root.
Claim 7
Dependent Claim
16 words
The preform of claim 1 wherein said inserts have a diameter greater than about 0.100 inch.
Claim 8
Dependent Claim
19 words
The preform of claim 6 wherein said fiber inserts have a diameter of about 0.130 to about 0.500 inch.
Claim 9
Dependent Claim
16 words
The preform of claim 1 wherein said inserts have a diameter less than about 0.100 inch.
Claim 10
Dependent Claim
16 words
The preform of claim 8 wherein said fiber inserts are sewn into the root precursor portion.
Claim 11
Dependent Claim
16 words
The blade of claim 1 wherein each insert is surrounded by a portion of braided root.
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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) | 1994-05-06 | 1994-11-05 | 1995-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-06 | 1998-11-05 | 1999-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-06 | 2002-11-05 | 2003-05-07 | $7700.00 | Window Closed / Lapsed |