US3758234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fiber blade with leading edge reinforcement
Assignee: UK Secretary of State for Defence
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Filing: 1972-05-05
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Granted: 1973-09-11
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Expires: 1992-05-05
Abstract
Abstract This invention concerns a leading edge reinforcement for a fiber reinforced blade suitable for use in a gas turbine engine. The reinforcement comprises two strips of metal joined together at and adjacent to an edge which is shaped to form the leading edge of the blade. At least a part of the remaining portion of the metal strip serves for the attachment of the reinforcement to the blade.
Inventors
- 👤 J Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:10
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; F04; F04D; F04D29/00; F04D29/02; F04D29/023; F04D29/26; F04D29/32; F04D29/321; F04D29/324; F05; F05D; F05D2240/00; F05D2240/20; F05D2240/30; F05D2240/303; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12389; Y10T428/12403; Y10T428/12444; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
In combination with a fiber reinforced gas turbine blade having a leading edge, a fiber aerofoil section and a trailing edge, an edge reinforcement for reinforcing the leading upstream edge of said fiber reinforced gas turbine blade, said reinforcement comprising: first and second strips of metal, each strip having a first section with a first thickness and a second section with a second thickness thinner than said first thickness, said first and second strips being joined along at least a portion of said first sections adjacent the leading edge of said blade, and said second thinner sections of said first and second strips extending into the fiber aerofoil section for strongly attaching said strips thereto.
Claim 2
Dependent Claim
115 words
In combination with a fiber reinforced gas turbine blade having a leading edge, a fiber aerofoil section and a trailing edge, an edge reinforcement for reinforcing the leading upstream edge of said fiber reinforced gas turbine blade, said reinforcement comprising: first and second strips of metal, each strip having a first section with a first thickness and a second section with a second thickness thinner than said first thickness, said first and second strips being joined along at least a portion of said first sections adjacent the leading edge of said blade, and said second thinner sections of said first and second strips extending into the fiber aerofoil section for strongly attaching said strips thereto.
Claim 3
Dependent Claim
29 words
The combination of claim 1, wherein the first section of said first and second strips are joined together forming the outer surface of the leading edge of said blade.
Claim 4
Dependent Claim
33 words
The combination of claim 1, in which fiber reinforced material is provided on the outside of said blade, covering at least a portion of said thinner sections of said first and second strips.
References Cited (Backward Citations)
US3176775A
Cited
US3294366A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |