US3705688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oval jet nozzle
Assignee: Motors Liquidation Co
•
Filing: 1971-09-07
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Granted: 1972-12-12
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Expires: 1991-09-07
Abstract
Abstract A variable jet propulsion nozzle of the multiflap type is characterized by an oval cross-section of the nozzle. The nozzle is reinforced against the effect of pressure tending to deform it toward a more nearly circular cross-section by a hollow reinforcing ring pressurized from within the exhaust duct. The nozzle has an ovate polygonal actuating ring for moving the flaps of the nozzle reciprocated by power cylinders coupled to the actuating ring by pull rods. The reinforcing ring includes tubes defining a sealed-off way through the reinforcing ring for the pull rods.
Inventors
- 👤 Charles H Smale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:20
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12; F02K1/1207; F02K1/40; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval crosssection; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; means for moving the flaps concurrently coupled to the flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
Claim 2
Dependent Claim
90 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval crosssection; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; means for moving the flaps concurrently coupled to the flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
Claim 3
Dependent Claim
111 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an inlet end of circular cross-section and an outlet end of oval cross-section; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; an actuating ring of ovate polygonal form for moving the flaps concurrently mounted for reciprocation axially of the duct and coupled to the flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
Claim 4
Dependent Claim
111 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an inlet end of circular cross-section and an outlet end of oval cross-section; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; an actuating ring of ovate polygonal form for moving the flaps concurrently mounted for reciprocation axially of the duct and coupled to the flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
Claim 5
Dependent Claim
139 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval cross-section; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; an actuating ring for moving the flaps concurrently mounted for reciprocation axially of the duct and coupled to the flaps; a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring; a plural number of actuators for reciprocating the actuating ring; rods extending axially of the duct coupling the actuators to the actuating ring; and tubes sealed in the reinforcing ring providing a way through the reinforcing ring for the rods.
Claim 6
Dependent Claim
139 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval cross-section; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct; an actuating ring for moving the flaps concurrently mounted for reciprocation axially of the duct and coupled to the flaps; a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring; a plural number of actuators for reciprocating the actuating ring; rods extending axially of the duct coupling the actuators to the actuating ring; and tubes sealed in the reinforcing ring providing a way through the reinforcing ring for the rods.
Claim 7
Dependent Claim
147 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval cross-section defined by successive arcs of different radii meeting at points spaced around the circumference of the duct; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct, the flaps including alternating master and slave flaps, the said meeting points being bridged by slave flaps, the hinge axes of the bridging slave flaps being angled to the common tangent to the said arcs at the meeting point; means for moving the flaps concurrently coupled to the master flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
Claim 8
Dependent Claim
147 words
A variable-area jet propulsion nozzle comprising, in combination, an engine exhaust duct adapted to conduct pressurized gas, the duct having an outlet end of oval cross-section defined by successive arcs of different radii meeting at points spaced around the circumference of the duct; a ring of overlapping flaps hinged to the outlet end of the duct and concurrently movable to vary the area for discharge of gas from the duct, the flaps including alternating master and slave flaps, the said meeting points being bridged by slave flaps, the hinge axes of the bridging slave flaps being angled to the common tangent to the said arcs at the meeting point; means for moving the flaps concurrently coupled to the master flaps; and a hollow reinforcing ring fixed on the outer surface of the duct near the outlet end and communicating with the duct to pressurize the reinforcing ring.
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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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |