Patent US3572733A successfully refreshed from Google Patents.
US3572733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal used in gas turbine engines
Assignee: General Electric Co
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Filing: 1969-01-02
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Granted: 1971-03-30
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Expires: 1989-01-02
Abstract
Abstract In a gas turbine engine an improved seal is provided for a shaft or the like projecting through a duct wall which defines a gas stream flow path. Two forms of seal are shown. Each provides, through the use of a sleeve, sealed axial movement and sealed lateral movement (in a normal plane) between the shaft and the duct wall. An effective seal is provided which accommodates differential thermal growth without stressing the components.
Inventors
- 👤 Werner E Howald
- 👤 Thomas L Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:39
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/06; F01D9/065; F01D11/00; F01D11/005; F02; F02C; F02C7/00; F02C7/28; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4472; F05; F05B; F05B2230/00; F05B2230/60; F05B2230/604; F05B2230/606; F05D; F05D2230/00; F05D2230/60; F05D2230/64; F05D2230/642
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A gas turbine engine having: a duct wall defining a gas flow path; a shaft projecting through said wall and movable, relative thereto in both an axial direction and in a direction normal to its axis, a sleeve telescoped over said shaft; and relatively movable sealing means between said duct and sleeve and between said sleeve and shaft for preventing flow into or out of the gas flow path while permitting said relative axial and normal movement between the shaft and duct.
Claim 2
Dependent Claim
82 words
A gas turbine engine having: a duct wall defining a gas flow path; a shaft projecting through said wall and movable, relative thereto in both an axial direction and in a direction normal to its axis, a sleeve telescoped over said shaft; and relatively movable sealing means between said duct and sleeve and between said sleeve and shaft for preventing flow into or out of the gas flow path while permitting said relative axial and normal movement between the shaft and duct.
Claim 3
Dependent Claim
43 words
A gas turbine engine as in claim 1 wherein: the sealing means permitting relative axial movement comprises a bore through the sleeve; and the sealing means permitting relative movement in the normal direction comprise radial annular surfaces formed on the sleeve and duct.
Claim 4
Dependent Claim
98 words
A gas turbine engine as in claim 2 wherein: the shaft has an enlarged collar received by the sleeve bore to cooperatively form the sealing means for axial movement; and the sleeve has a circumferential flange projecting outwardly to form one of said annular surfaces on one radial face thereof and a boss on the duct wall having the other annular surface which engages said sleeve annular surface, and a sealing ring, also mounted on said boss, engages the opposite radial face of the flange to cooperatively form the sealing means, permitting relative movement in a normal direction.
Claim 5
Dependent Claim
67 words
A gas turbine engine as in claim 1 wherein: a boss is provided on the duct wall with a bore surrounding said sleeve and the sleeve has a cylindrical surface cooperating with said bore to form the sealing means permitting relative movement in an axial direction; and the sealing means permitting relative movement in the normal direction comprise radial annular surfaces formed on said sleeve and shaft.
Claim 6
Dependent Claim
55 words
A gas turbine engine as in claim 4 wherein the shaft has a circumferential flange providing, on one face, one of said radial annular surfaces and the sleeve has a matching seat providing the other radial annular surface and a sealing ring, mounted on the sleeve, engages the other radial face of the shaft flange.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |