US3591087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for augmenting the thrust of an aircraft jet engine
Assignee: Rohr Inc
•
Filing: 1969-05-08
•
Granted: 1971-07-06
•
Expires: 1989-05-08
Abstract
Abstract The jetstream flowing through a tubular thrust ejector is prevented from detaching from the inner surface thereof by admitting a portion of the boundary layer of said jetstream into holes which terminate within an area encircling the aft portion of said inner surface and which communicate with the forward portion of the ejector throat.
Inventors
- 👤 Remo Tontini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:15
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A tubular thrust augmenting ejector for preventing detachment of the jetstream therewithin, said ejector having disposed therewithin a throat member which first converges in the downstream direction and then diverges so that the throat of said ejector is constricted between the ends thereof, said throat member having longitudinal slotted perforations therethrough adjacent the forward and aft end thereof and disposed circumferentially about the wall of said throat member, said ejector having a wall with at least one internal, longitudinally extending passage extending therethrough, said forward and aft slotted perforations having communications therebetween through said passage.
Claim 2
Dependent Claim
95 words
A tubular thrust augmenting ejector for preventing detachment of the jetstream therewithin, said ejector having disposed therewithin a throat member which first converges in the downstream direction and then diverges so that the throat of said ejector is constricted between the ends thereof, said throat member having longitudinal slotted perforations therethrough adjacent the forward and aft end thereof and disposed circumferentially about the wall of said throat member, said ejector having a wall with at least one internal, longitudinally extending passage extending therethrough, said forward and aft slotted perforations having communications therebetween through said passage.
Claim 3
Dependent Claim
41 words
An ejector as defined in claim 1, wherein perforated sleeves are disposed respectively within the forward convergent and aft divergent portions of said throat member, said sleeves having a plurality of holes therethrough which overlay said slots of said throat member.
Claim 4
Dependent Claim
31 words
An ejector as defined in claim 2, wherein said holes are inclined relative to the longitudinal axis of said ejector so that their inner ends are forward of their outer ends.
Claim 5
Dependent Claim
29 words
An ejector as defined in claim 1, wherein sleeve sections constructed of porous material are disposed respectively within the forward convergent and aft divergent portions of said throat member.
Claim 6
Dependent Claim
41 words
An ejector as defined in claim 1, wherein perforated sleeves are disposed respectively within the forward convergent and aft divergent portions of said throat member, said sleeves having a plurality of holes therethrough which overlay said slots of said throat member.
Claim 7
Dependent Claim
31 words
An ejector as defined in claim 2, wherein said holes are inclined relative to the longitudinal axis of said ejector so that their inner ends are forward of their outer ends.
Claim 8
Dependent Claim
29 words
An ejector as defined in claim 1, wherein sleeve sections constructed of porous material are disposed respectively within the forward convergent and aft divergent portions of said throat member.
References Cited (Backward Citations)
CA569189A
Cited
US2514749A
Cited
US2674845A
Cited
US2709337A
Cited
US2943444A
Cited
US3041825A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |