US3650110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse thrust device for supersonic jet engine
Assignee: Individual
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Filing: 1970-06-02
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Granted: 1972-03-21
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Expires: 1990-06-02
Abstract
Abstract Combustion products exiting from the rear turbine of a jet engine are conducted through an annular passage surrounding a rear internal body section slidably mounting an exhaust nozzle blocking piston. The exhaust nozzle is releasably locked to the engine housing in a normal mode of operation and released for displacement by the piston when extended to its nozzle blocking position for engine starting purposes and to form a reverse thrust discharge passage by rearward displacement of the nozzle.
Inventors
- 👤 John N Ghougasian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:23
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/54; F02K1/56; F02K1/566; F02C; F02C7/00; F02C7/26; F02C9/00; F02C9/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
171 words
In a supersonic jet engine having an intake section, a powered compressor and a combustion section, internal aerodynamic control means comprising variable passage restricting means through which air is conducted from the compressor into the combustion section, said intake section conducting an inflow of air under supersonic conditions producing a predetermined pressure recovery for the air entering the combustion section, and control means operatively connected to said variable passage restricting means for artificially producing said predetermined pressure recovery under subsonic conditions during braking operation, an exhaust passage section conducting exhaust gas from the combustion section, exhaust nozzle means movably mounted on the exhaust passage section for rearwardly discharging the exhaust gas therefrom, braking means responsive to rearward displacement of the nozzle means for discharging the exhaust gas forwardly from the exhaust passage section during said braking operation, a piston valve and means mounting the valve within the exhaust passage section for displacement into engagement with the exhaust nozZle means blocking rearward discharge of the exhaust gas therefrom during said braking operation.
Claim 2
Dependent Claim
171 words
In a supersonic jet engine having an intake section, a powered compressor and a combustion section, internal aerodynamic control means comprising variable passage restricting means through which air is conducted from the compressor into the combustion section, said intake section conducting an inflow of air under supersonic conditions producing a predetermined pressure recovery for the air entering the combustion section, and control means operatively connected to said variable passage restricting means for artificially producing said predetermined pressure recovery under subsonic conditions during braking operation, an exhaust passage section conducting exhaust gas from the combustion section, exhaust nozzle means movably mounted on the exhaust passage section for rearwardly discharging the exhaust gas therefrom, braking means responsive to rearward displacement of the nozzle means for discharging the exhaust gas forwardly from the exhaust passage section during said braking operation, a piston valve and means mounting the valve within the exhaust passage section for displacement into engagement with the exhaust nozZle means blocking rearward discharge of the exhaust gas therefrom during said braking operation.
Claim 3
Dependent Claim
45 words
The combination of claim 1 including means for locking the nozzle means to the exhaust passage section in a forward thrust producing mode of operation, said piston valve means being extended into engagement with the nozzle means when locked during a starting mode of operation.
Claim 4
Dependent Claim
109 words
In a jet engine having an intake section, a powered compressor and a combination section; an exhaust passage section having a fixed convergent end portion through which exhaust gas from the combustion section is conducted, exhaust nozzle means movably mounted on the exhaust passage section for rearwardly discharging the exhaust gas therefrom, braking means responsive to displacement of the nozzle means rearwardly of the convergent end portion for discharging the exhaust gas forwardly therefrom, and piston valve means mounted in the exhaust passage section and rearwardly extensible therefrom into engagement with the exhaust nozzle means for said rearward displacement thereof and to block rearward discharge of the exhaust gas.
Claim 5
Dependent Claim
109 words
In a jet engine having an intake section, a powered compressor and a combination section; an exhaust passage section having a fixed convergent end portion through which exhaust gas from the combustion section is conducted, exhaust nozzle means movably mounted on the exhaust passage section for rearwardly discharging the exhaust gas therefrom, braking means responsive to displacement of the nozzle means rearwardly of the convergent end portion for discharging the exhaust gas forwardly therefrom, and piston valve means mounted in the exhaust passage section and rearwardly extensible therefrom into engagement with the exhaust nozzle means for said rearward displacement thereof and to block rearward discharge of the exhaust gas.
Claim 6
Dependent Claim
45 words
The combination of claim 3 including means for locking the nozzle means to the exhaust passage section in a forward thrust producing mode of operation, said piston valve means being extended into engagement with the nozzle means when locked during a starting mode of operation.
Claim 7
Dependent Claim
139 words
In a jet propulsion power unit having a convergent exhaust section, an axially adjustable discharge nozzle having convergent and divergent passage portions and a forward face engageable with the exhaust section, means for locking the nozzle in a first position with the forward face engaging the exhaust section wherein the convergent passage portion conducts exhaust discharge from the exhaust section rearwardly through the divergent passage portion, and control means extensible from the exhaust section into engagement with the nozzle for blocking flow through the passage portions thereof and displacing the same to a second position with the forward face spaced from the exhaust section forming a reverse flow passage, said control means comprising a piston valve received within the convergent passage portion of the nozzle and projecting into the divergent passage portion to block flow rearwardly through the nozzle.
Claim 8
Dependent Claim
139 words
In a jet propulsion power unit having a convergent exhaust section, an axially adjustable discharge nozzle having convergent and divergent passage portions and a forward face engageable with the exhaust section, means for locking the nozzle in a first position with the forward face engaging the exhaust section wherein the convergent passage portion conducts exhaust discharge from the exhaust section rearwardly through the divergent passage portion, and control means extensible from the exhaust section into engagement with the nozzle for blocking flow through the passage portions thereof and displacing the same to a second position with the forward face spaced from the exhaust section forming a reverse flow passage, said control means comprising a piston valve received within the convergent passage portion of the nozzle and projecting into the divergent passage portion to block flow rearwardly through the nozzle.
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) | 1975-03-21 | 1975-09-20 | 1976-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-21 | 1979-09-20 | 1980-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-21 | 1983-09-20 | 1984-03-21 | $7700.00 | Window Closed / Lapsed |