US3604663A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet engine thrust enhancer
Assignee: CUSTER CHANNEL WING CORP
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Filing: 1969-07-15
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Granted: 1971-09-14
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Expires: 1989-07-15
Abstract
Abstract Apparatus for enhancing jet engine efficiency and creating increased thrust, utilizing effective created pressure differentials to establish forward reaction thrust. The apparatus basically consists of a bell-shaped member disposed forward of the engine intake throat. In a modified form a partial bellshaped member is combined with a lift channel for increased operating efficiency.
Inventors
- 👤 Willard R Custer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:55
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/04; Y; Y10; Y10T; Y10T137/00; Y10T137/0536
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A thrust enhancer for use in conjunction with the air intake of a jet engine for increasing effective thrust of the engine, comprising an internally unrestricted bell-shaped member mounted positionally forward of the intake of said engine, said member having a forward open end flared portion with an outer diameter substantially greater than the greatest diameter of said engine or the inlet thereof and a cylindrical rear portion of constant diameter, the diameter being the same as the diameter of the engine inlet, and into which said flared portion exhausts and which in turn exhausts into said engine inlet, induced air velocity into said open-flared portion and over the inner front surface of said bell-shaped member creating a zone of negative pressure on the front surface of the flared portion as compared with effective atmospheric pressure on the rear surface with a resultant imparted forward reaction thrust of atmospheric pressure on the rear surface and thereby to the engine.
Claim 2
Dependent Claim
159 words
A thrust enhancer for use in conjunction with the air intake of a jet engine for increasing effective thrust of the engine, comprising an internally unrestricted bell-shaped member mounted positionally forward of the intake of said engine, said member having a forward open end flared portion with an outer diameter substantially greater than the greatest diameter of said engine or the inlet thereof and a cylindrical rear portion of constant diameter, the diameter being the same as the diameter of the engine inlet, and into which said flared portion exhausts and which in turn exhausts into said engine inlet, induced air velocity into said open-flared portion and over the inner front surface of said bell-shaped member creating a zone of negative pressure on the front surface of the flared portion as compared with effective atmospheric pressure on the rear surface with a resultant imparted forward reaction thrust of atmospheric pressure on the rear surface and thereby to the engine.
Claim 3
Dependent Claim
25 words
A thrust enhancer as claimed in claim 1, said bell-shaped member including a front, open-faced, streamlined air scoop portion merging into said cylindrical rear portion.
Claim 4
Dependent Claim
35 words
Apparatus as claimed in claim 1, said bell-shaped member having a rear upwardly open channel portion, said flared portion opening upwardly, said channel and flared portions merging and mating to form a composite lift channel.
Claim 5
Dependent Claim
15 words
Apparatus as claimed in claim 3, said channel portion being airfoil shaped in cross section.
Claim 6
Dependent Claim
18 words
Apparatus as claimed in claim 3, said channel and said flared portions being airfoil shaped in cross section.
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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |