US3834834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compact high thrust augmentation ejector system
Assignee: United States Department of the Air Force
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Filing: 1973-03-07
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Granted: 1974-09-10
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Expires: 1993-03-07
Abstract
Abstract A thrust augmentation system having thrust augmentation channels with the reservoir length absorbed in the inlet length and with a plurality of root nozzles positioned at the inlet to mixing duct transition region together with a plurality of hypermixing nozzles extending substantially across the width of the ejector duct.
Inventors
- 👤 B Quinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:20
CPC Classifications
F; F04; F04F; F04F5/00; F04F5/44; F04F5/46; F04F5/466; F04F5/14; F04F5/16
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
179 words
In a thrust augmentation ejector system, comprising: a rectangular shaped duct having an inlet region, a mixing region and a diffuser region; a pair of primary gas supply ducts forming side walls for said inlet region; a plurality of first spaced apart hypermixing nozzles extending from one of said side walls appRoximately one half way across said inlet region; a plurality of second spaced apart hypermixing nozzles extending from the other side wall approximately to said first hypermixing nozzles in said inlet region with the nozzles extending from the one side wall being in substantial alignment with the nozzles extending from the other side wall; said hypermixing nozzles having exit slots positioned approximately at the inlet region to mixing region transition; a plurality of root nozzles, in the walls of said supply ducts and positioned between the hypermixing nozzles; said root nozzles including means positioned at the inlet region to mixing region transition, for directing a flow of primary air along the wall of said mixing region and means for supplying air under pressure to said gas supply ducts.
Claim 2
Dependent Claim
179 words
In a thrust augmentation ejector system, comprising: a rectangular shaped duct having an inlet region, a mixing region and a diffuser region; a pair of primary gas supply ducts forming side walls for said inlet region; a plurality of first spaced apart hypermixing nozzles extending from one of said side walls appRoximately one half way across said inlet region; a plurality of second spaced apart hypermixing nozzles extending from the other side wall approximately to said first hypermixing nozzles in said inlet region with the nozzles extending from the one side wall being in substantial alignment with the nozzles extending from the other side wall; said hypermixing nozzles having exit slots positioned approximately at the inlet region to mixing region transition; a plurality of root nozzles, in the walls of said supply ducts and positioned between the hypermixing nozzles; said root nozzles including means positioned at the inlet region to mixing region transition, for directing a flow of primary air along the wall of said mixing region and means for supplying air under pressure to said gas supply ducts.
Claim 3
Dependent Claim
76 words
The device as recited in claim 1 wherein said hypermixing nozzles have exit slots which are divided into a plurality of regions by flow separators, with each nozzle having a region adjacent the supply duct wall with means for directing a straight flow through the mixing region and having other alternate regions including means for directing the flow alternately in opposite directions at an angle with respect to a straight line flow through the mixing region.
Claim 4
Dependent Claim
32 words
The device as recited in claim 2 wherein the shape of the supply duct wall and the shape of the hypermixing nozzle provides a gradually decreasing inlet area toward the mixing region.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |