Patent US3602608A successfully refreshed from Google Patents.
US3602608A
Expired / Lapsed
US
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Composite blade
Assignee: Rolls Royce PLC
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Filing: 1969-07-28
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Granted: 1971-08-31
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Expires: 1989-07-28
Abstract
Abstract A blade such as a compressor or turbine blade for use in a gas turbine engine consists of a plurality of fiber reinforced layers, such as carbon fiber the planes of the layers being arranged at an acute angle to the chord of the blade. The fibers of adjacent layers can be inclined at an acute angle to each other and adjacent the leading edge of the blade some of the fibers of the adjacent layers can be perpendicular to one another. The blade can have a metal reinforcement in the form of an arch extending around the leading edge, tip and trailing edge of the blade.
Inventors
- 👤 John G Morley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:52
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A blade for use in an elastic fluid flow machine comprising a plurality of fiber reinforced layers bonded together in parallel relationship to each other to form the blade, said layers lying in planes extending at a predetermined acute angle theta ( theta ) to a chord of the blade and each of the layers having the fibers therein extending approximately along the length of the blade from the root to the tip with fibers of adjacent layers making a predetermined acute angle phi ( phi ) with each other.
Claim 2
Dependent Claim
90 words
A blade for use in an elastic fluid flow machine comprising a plurality of fiber reinforced layers bonded together in parallel relationship to each other to form the blade, said layers lying in planes extending at a predetermined acute angle theta ( theta ) to a chord of the blade and each of the layers having the fibers therein extending approximately along the length of the blade from the root to the tip with fibers of adjacent layers making a predetermined acute angle phi ( phi ) with each other.
Claim 3
Dependent Claim
29 words
A blade as claimed in claim 1 in which the angle phi ( phi ) between fibers of the adjacent layers increases towards the leading edge of the blade.
Claim 4
Dependent Claim
24 words
A blade as claimed in claim 1 in which some of the fibers of adjacent layers increases towards the leading edge of the blade.
Claim 5
Dependent Claim
28 words
A blade as claimed in claim 1 in which the fibers of adjacent layers make an acute angle phi ( phi ) with each other up to 10*.
Claim 6
Dependent Claim
35 words
A blade as claimed in claim 1 in which individual fibers within the layers make an acute angle up to 5* with a mean line extending from the root to the tip of the blade.
Claim 7
Dependent Claim
57 words
A blade as claimed in claim 1 in which the fibers of adjacent layers make an acute angle phi ( phi ) with each other up to 10* and in which individual fibers within the layers make an acute angle up to 5* with a mean line extending from the root to the tip of the blade.
Claim 8
Dependent Claim
13 words
A blade as claimed in claim 6 in which the fibers are carbon.
Claim 9
Dependent Claim
33 words
A blade as claimed in claim 1 including a metal reinforcement in a form of an arch extending along the leading edge, around the tip, and along the trailing edge of the blade.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |