Patent JPS54123884A successfully refreshed from Google Patents.
US5049036A
Expired / Lapsed
US
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Composite blade with divergent root and method for making same
Assignee: Turbine Engine Components Textron Inc
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Filing: 1989-11-29
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Granted: 1991-09-17
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Expires: 2009-11-29
Abstract
Abstract A composite gas turbine engine blade is made by braiding a plurality of fibers to form a preform having an airfoil precursor portion and an integral root precursor portion. A plurality of fiber shaping inserts are positioned in the root precursor portion, either by braiding the root precursor portion around the inserts or inserting the fiber shaping inserts into the root precursor portion after braiding, 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 the 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
2026-11-05 12:01
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; 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: 12
Claim 1
Independent Claim
61 words
A gas turbine engine blade comprising a 3D braided fiber preform infiltrated with a matrix material and shaped to form a 3D braided airfoil and integral 3D braided root, said root having a plurality of fiber inserts extending chordwise of the blade therein to impart an enlarged, divergent shape to the braided root in a direction transverse to said chordwise direction.
Claim 2
Dependent Claim
61 words
A gas turbine engine blade comprising a 3D braided fiber preform infiltrated with a matrix material and shaped to form a 3D braided airfoil and integral 3D braided root, said root having a plurality of fiber inserts extending chordwise of the blade therein to impart an enlarged, divergent shape to the braided root in a direction transverse to said chordwise direction.
Claim 3
Dependent Claim
21 words
The blade of claim 1 wherein said fiber inserts are spaced apart substantially parallel to one another in the chordwise direction.
Claim 4
Dependent Claim
13 words
The blade of claim 1 wherein said fiber inserts comprise braided fiber inserts.
Claim 5
Dependent Claim
13 words
The blade of claim 1 wherein said fiber inserts comprise uniaxial fiber inserts.
Claim 6
Dependent Claim
14 words
The blade of claim 1 wherein uniaxial fiber inserts are overwrapped by helical fibers.
Claim 7
Dependent Claim
27 words
The blade 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 8
Dependent Claim
17 words
The blade of claim 1 wherein said fiber inserts have a diameter greater than about 0.100 inch.
Claim 9
Dependent Claim
19 words
The blade of claim 1 wherein said fiber inserts have a diameter of about 0.130 to about 0.500 inch.
Claim 10
Dependent Claim
17 words
The blade of claim 1 wherein said fiber inserts have a diameter less than about 0.100 inch.
Claim 11
Dependent Claim
19 words
The blade of claim 1 wherein said fiber inserts have a diameter of about 0.020 to about 0.080 inch.
Claim 12
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) | 1994-09-16 | 1995-03-18 | 1995-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-16 | 1999-03-18 | 1999-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-16 | 2003-03-18 | 2003-09-17 | $7700.00 | Window Closed / Lapsed |