US3869222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal means for a gas turbine engine
Assignee: Ford Motor Co
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Filing: 1973-06-07
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Granted: 1975-03-04
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Expires: 1993-06-07
Abstract
Abstract A pressure seal for separating elements of a gas turbine engine shroud assembly. The seal accommodates for differing rates and magnitudes of thermal expansion and is not significantly affected by eccentricities of out-of-roundness between the shroud elements. The seal is annular and has a generally Y-shaped cross section. The bifurcated or divergent elements of the seal are clamped within the base without welding.
Inventors
- 👤 Christian J Rahnke
- 👤 James K Vallance
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:32
CPC Classifications
F; F01; F01D; F01D11/00; F01D11/005; F01D25/00; F01D25/08; F02; F02C; F02C7/00; F02C7/20
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
In a gas turbine engine having turbine rotor means constructed to rotate about a given axis, annular shroud means surrounding said rotor means, said shroud means including generally annular elements being axially separated to accommodate for thermal expansion of said elements, annular seal means positioned within the axial separations between said elements, said seal means having a pair of resiliently deformable fingers axially compressed between said elements, said seal means having a generally Y-shaped cross section, said seal separating volumes of said engine having differing pressures, the top of ''''Y'''' being exposed to the higher pressure whereby the pressure differential increases the sealing.
Claim 2
Dependent Claim
103 words
In a gas turbine engine having turbine rotor means constructed to rotate about a given axis, annular shroud means surrounding said rotor means, said shroud means including generally annular elements being axially separated to accommodate for thermal expansion of said elements, annular seal means positioned within the axial separations between said elements, said seal means having a pair of resiliently deformable fingers axially compressed between said elements, said seal means having a generally Y-shaped cross section, said seal separating volumes of said engine having differing pressures, the top of ''''Y'''' being exposed to the higher pressure whereby the pressure differential increases the sealing.
Claim 3
Dependent Claim
23 words
A gas turbine engine according to claim 1, said shroud annular elements having parallel surfaces perpendicular to said axis engaging said seal means.
Claim 4
Dependent Claim
33 words
A gas turbine engine according to claim 2, said seal means having an annular base, a pair of divergent annular leaves extending radially outwardly from said base and resiliently engaging said parallel surfaces.
Claim 5
Dependent Claim
113 words
In a gas turbine engine having turbine rotor means constructed to rotate about a given axis, annular shroud means surrounding said rotor means, said shroud means including generally annular elements being axially separated to accommodate for thermal expansion of said elements, said shroud annular elements having parallel surfaces perpendicular to said axis engaging said seal means, annular seal means positioned within the axial separations between said elements, said seal means including an annular base having generally a U-shaped cross section, a pair of divergent annular leaves extending radially outwardly from said base and resiliently engaging said parallel surfaces, the radially inner portions of said divergent annular leaves being clamped within said annular base.
Claim 6
Dependent Claim
113 words
In a gas turbine engine having turbine rotor means constructed to rotate about a given axis, annular shroud means surrounding said rotor means, said shroud means including generally annular elements being axially separated to accommodate for thermal expansion of said elements, said shroud annular elements having parallel surfaces perpendicular to said axis engaging said seal means, annular seal means positioned within the axial separations between said elements, said seal means including an annular base having generally a U-shaped cross section, a pair of divergent annular leaves extending radially outwardly from said base and resiliently engaging said parallel surfaces, the radially inner portions of said divergent annular leaves being clamped within said annular base.
Claim 7
Dependent Claim
56 words
A gas turbine engine according to claim 4, said annular base having a generally axially extending flange portion, a circular groove formed in one of said parallel surfaces of said shroud annular elements receiving the axially extending flange portion to limit the displacement of said seal means in a plane substantially perpendicular to said given axis.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |