US4214722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pollution reducing aircraft propulsion
Assignee: Individual
•
Filing: 1978-11-15
•
Granted: 1980-07-29
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Expires: 1998-11-15
Abstract
Abstract Aircraft engine exhaust is mixed with air and fuel and recombusted. Air is drawn into the secondary combustion chamber from suction surfaces on wings. Exhaust of the secondary combustion chamber is blown over wing and fuselage surfaces.
Inventors
- 👤 Raymond M. Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:07
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/16; B64C21/00; B64C21/02; B64C21/025; B64C2230/00; B64C2230/04; B64C2230/06; B64C2230/16; B64C2230/28; Y; Y02; Y02T; Y02T50/00; Y02T50/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
182 words
An aircraft pollution reducing propulsion airfoil system comprising a wing having upper and lower surfaces comprising wing skin plates extending longitudinally on the wing and being spaced one from another in chordwise directions, spars extending into the wing between the surfaces, stringer ducts extending along internal sides of the wing surfaces, the stringers having relatively rigid surface-supporting structure and having outward directed openings extending across the wing surfaces, interrupting the wing surfaces between edges of the wing skin plates, the ducts thereby forming stringer structural elements supporting the wing skin plates, the outward directed openings of the stringer ducts being arranged perpendicularly to the wing surfaces in a leading portion of the wing and tangential to the wing surfaces in a trailing portion of the wing surfaces, suction means connected to the stringer ducts with perpendicular openings for drawing gas into the ducts through those openings and blowing means connected to the ducts with tangential openings for flowing gas out of the tangential openings, combustion means connected to the suction means and to the blowing means for accelerating gas through the means.
Claim 2
Dependent Claim
182 words
An aircraft pollution reducing propulsion airfoil system comprising a wing having upper and lower surfaces comprising wing skin plates extending longitudinally on the wing and being spaced one from another in chordwise directions, spars extending into the wing between the surfaces, stringer ducts extending along internal sides of the wing surfaces, the stringers having relatively rigid surface-supporting structure and having outward directed openings extending across the wing surfaces, interrupting the wing surfaces between edges of the wing skin plates, the ducts thereby forming stringer structural elements supporting the wing skin plates, the outward directed openings of the stringer ducts being arranged perpendicularly to the wing surfaces in a leading portion of the wing and tangential to the wing surfaces in a trailing portion of the wing surfaces, suction means connected to the stringer ducts with perpendicular openings for drawing gas into the ducts through those openings and blowing means connected to the ducts with tangential openings for flowing gas out of the tangential openings, combustion means connected to the suction means and to the blowing means for accelerating gas through the means.
Claim 3
Dependent Claim
19 words
The system of claim 1 wherein leading portions of wing skin plates are inwardly curved toward the tangential openings.
Claim 4
Dependent Claim
56 words
The system of claim 1 wherein each stringer duct with a tangential opening has a tear-shaped cross section with a bulbous forward section containing a main passageway, and a tapered rearward section containing a restricted rearward directed passageway leading to a slot on a surface for blowing gas from the main passageway rearward over the surface.
Claim 5
Dependent Claim
53 words
The system of claim 1 further wherein the blowing means further comprises a blower duct in a trailing edge of an airfoil, having a main passageway extending along the duct and having a passageway extending rearward then upward and downward to slots along a flap for directing blown gas rearward over the flap.
Claim 6
Dependent Claim
18 words
The system of claim 2 wherein edges of the wing skin plates are recessed in the stringer ducts.
Claim 7
Dependent Claim
32 words
The system of claim 1 wherein the ducts comprise suction ducts mounted in a forward upper portion of the airfoil and blower ducts mounted in a rearward upper portion of the airfoil.
Claim 8
Dependent Claim
17 words
The system of claim 6 further comprising blower ducts mounted along a lower surface of the airfoil.
References Cited (Backward Citations)
BE499833A
Cited
DE539614C
Cited
FR893103A
Cited
US2478792A
Cited
GB634332A
Cited
US2516489A
Cited
FR1161707A
Cited
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Cited
US3887147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-29 | 1984-01-28 | 1984-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-29 | 1988-01-28 | 1988-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-29 | 1992-01-28 | 1992-07-29 | $7700.00 | Window Closed / Lapsed |