US3600103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite blade
Assignee: RTX Corp
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Filing: 1969-10-06
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Granted: 1971-08-17
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Expires: 1989-10-06
Abstract
Abstract A compressor or fan blade is made up of layers of high modulus fibers extending in parallel relation, and embedded in a metallic matrix, the successive layers of fibers varying in length and dimension so that, when stacked and compacted together, the desired blade configuration will be obtained. The blade may be made by a process including stacking the layers of fibers which are secured to a metallic supporting sheet, in the proper sequence, and then compacting the assemblage in dies under pressure and high temperature to cause the material of the several backing sheets to fill the voids among the fibers and form the matrix within which the fibers are embedded.
Inventors
- 👤 David F Gray
- 👤 Charles E Doughty
- 👤 Frank B Pinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:20
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/16; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
A composite blade material for a compressor having a plurality of layers of high modulus plies stacked on each side of a thin sheet of aluminum alloy which is located centrally of the blade, the plies comprising high modulus fibers selected from the group consisting of boron and silicon carbide coated boron fibers and a matrix material which is an aluminum alloy, and the plies varying in width and length to provide a varying blade thickness chordwise and lengthwise.
Claim 2
Dependent Claim
79 words
A composite blade material for a compressor having a plurality of layers of high modulus plies stacked on each side of a thin sheet of aluminum alloy which is located centrally of the blade, the plies comprising high modulus fibers selected from the group consisting of boron and silicon carbide coated boron fibers and a matrix material which is an aluminum alloy, and the plies varying in width and length to provide a varying blade thickness chordwise and lengthwise.
Claim 3
Dependent Claim
50 words
A blade according to claim 1 wherein the plies are stacked according to size to form an assemblage of layers graduated in size, with the smaller plies central of the assemblage and the larger plies outer of the smaller plies, the outermost ply being substantially continuous over the blade surface.
Claim 4
Dependent Claim
48 words
A blade according to claim 1 having further a root portion at one end of the blade and an airfoil port on, wherein the fibers and matrix form the complete airfoil portion and extend into and form a projecting portion which is a part of the root portion.
Claim 5
Dependent Claim
20 words
A blade according to claim 1 wherein the fiber constitutes substantially 50 percent of the volume of the finished blade.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |