Patent US3591963A successfully refreshed from Google Patents.
US3591963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inflatable seal for aircraft jet engines
Assignee: Entwicklungsring Sued GmbH
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Filing: 1969-06-13
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Granted: 1971-07-13
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Expires: 1989-06-13
Abstract
Abstract A sealing means for providing a seal between the intake of a jet engine and the receiving ring of an air intake duct mounted upon the airframe. The sealing means includes a cylinder of flexible material, one end of which is secured to the intake duct. Formed integrally with the cylinder and located adjacent the end of the cylinder farthest from the engine is an inflatable annular tube. Located within the tube is a resilient flattening member which, upon deflation of the tube, expands to flatten the tube so as to facilitate installation or removal of the engine. The interior of the tube is, through a directional flow control valve, in communication with the exhaust air chamber of the engine so that the exhaust gases will maintain the tube in an inflated condition. Disposed about a portion of the outer surface of the tube are a plurality of lands which enhance the sealing characteristics between the tube and the associated portion of the aircraft structure.
Inventors
- 👤 Gerhard Kopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:31
CPC Classifications
B; B64; B64D; B64D33/00; B64D27/00; B64D27/40; F; F02; F02C; F02C7/00; F02C7/04; F02C7/20; F02K; F02K1/00; F02K1/78; F02K1/80; F02K1/805
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a resilient cylindrical member forming a wall portion of the engine secured to the intake flange of the engine, and an inflatable annular tube positioned about said cylindrical member.
Claim 2
Dependent Claim
57 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a resilient cylindrical member forming a wall portion of the engine secured to the intake flange of the engine, and an inflatable annular tube positioned about said cylindrical member.
Claim 3
Dependent Claim
28 words
An inflatable sealing means in accordance with claim 1 including a resilient flattening member positioned within said tube for flattening said tube upon the release of pressure therefrom.
Claim 4
Dependent Claim
25 words
An inflatable sealing means in accordance with claim 2 wherein a portion of the outwardly disposed surface of said tube is provided with sealing lands.
Claim 5
Dependent Claim
25 words
An inflatable sealing means in accordance with claim 3 including means for connecting the compressor of the jet engine with said tube for inflation thereof.
Claim 6
Dependent Claim
26 words
A sealing means in accordance with claim 4 wherein said compressor connecting means is disposed to extend in a downward direction when the engine is installed.
Claim 7
Dependent Claim
52 words
A sealing means in accordance with claim 5 wherein said tube is provided with at least one control valve, mounting means for said engine including a lever associated with the mounting means and means for causing the actuation of said valve by said lever upon removal of the engine from the aircraft.
Claim 8
Dependent Claim
27 words
A sealing means in accordance with claim 4 wherein a directional flow control valve is provided in said connecting means between the engine and said inflatable seal.
Claim 9
Dependent Claim
67 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a cylindrical member secured to the intake flange of the engine, an inflatable annular tube positioned about said cylindrical member and a resilient flattening member positioned within said tube for flattening said tube upon the release of pressure therefrom.
Claim 10
Dependent Claim
67 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a cylindrical member secured to the intake flange of the engine, an inflatable annular tube positioned about said cylindrical member and a resilient flattening member positioned within said tube for flattening said tube upon the release of pressure therefrom.
Claim 11
Dependent Claim
25 words
An inflatable sealing means in accordance with claim 8 wherein a portion of the outwardly disposed surface of said tube is provided with sealing lands.
Claim 12
Dependent Claim
64 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a cylindrical member secured to the intake flange of the engine, an inflatable annular tube positioned about said cylindrical member, and means for connecting the compressor of the jet engine with said tube for inflation thereof.
Claim 13
Dependent Claim
64 words
An inflatable sealing means particularly adapted for use between an aircraft airframe and a jet engine having an intake flange and a compressor section, said sealing means comprising a cylindrical member secured to the intake flange of the engine, an inflatable annular tube positioned about said cylindrical member, and means for connecting the compressor of the jet engine with said tube for inflation thereof.
Claim 14
Dependent Claim
27 words
A sealing means in accordance with claim 10 wherein a directional flow control valve is provided in said connecting means between the engine and said inflatable seal.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |