US3887299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-abradable turbine seal
Assignee: United States Department of the Air Force
•
Filing: 1973-08-28
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Granted: 1975-06-03
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Expires: 1993-08-28
Abstract
Abstract A non-abradable turbine seal for use between the blade member and surrounding shroud of the turbine engine. The seal may take on a variety of configurations, any one of which constructed to allow deformation thereof by the blade member, either because of rotor growth or shroud eccentricities. The seals are made of oxidation resistant compressible or crushable materials in the form of thin metallic foil, pads, ceramic hollow spheres or thin walled tubing.
Inventors
- 👤 Daniel Profant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:19
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/08; F01D11/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
In a turbine engine comprising a rotating blade member and a surrounding fixed shroud wherein said improvement comprises a non-abradable seal having an outer housing located within and fixed to said shroud, said outer housing being made of an easily deformable foil material and a thin deformable foil material of sine-wave configuration being located within said outer housing with the peaks and depressions of the sine-wave being directed axially and facing the rotating blade member; thereby allowing for the lateral displacement of said seal under the action of said rotating blade member.
Claim 2
Dependent Claim
92 words
In a turbine engine comprising a rotating blade member and a surrounding fixed shroud wherein said improvement comprises a non-abradable seal having an outer housing located within and fixed to said shroud, said outer housing being made of an easily deformable foil material and a thin deformable foil material of sine-wave configuration being located within said outer housing with the peaks and depressions of the sine-wave being directed axially and facing the rotating blade member; thereby allowing for the lateral displacement of said seal under the action of said rotating blade member.
Claim 3
Dependent Claim
92 words
In a turbine engine comprising a rotating blade member and a surrounding fixed shroud wherein said improvement comprises a non-abradable seal having an outer housing located within and fixed to said shroud, said outer housing being made of an easily deformable foil material and a thin deformable foil material of sine-wave configuration being located within said outer housing with the peaks and depressions of the sine-wave being directed axially and facing the rotating blade member; thereby allowing for the lateral displacement of said seal under the action of said rotating blade member.
Claim 4
Dependent Claim
92 words
In a turbine engine comprising a rotating blade member and a surrounding fixed shroud wherein said improvement comprises a non-abradable seal having an outer housing located within and fixed to said shroud, said outer housing being made of an easily deformable foil material and a thin deformable foil material of sine-wave configuration being located within said outer housing with the peaks and depressions of the sine-wave being directed axially and facing the rotating blade member; thereby allowing for the lateral displacement of said seal under the action of said rotating blade member.
Claim 5
Dependent Claim
18 words
In a turbine engine as defined in claim 1 wherein said foil material is between 5-10 mils thick.
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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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |