Patent US3704828A successfully refreshed from Google Patents.
US3704828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft fan with outflow deflectors
Assignee: Hamburger Flugzeugbau GmbH
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Filing: 1970-12-02
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Granted: 1972-12-05
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Expires: 1990-12-02
Abstract
Abstract The cruise and lift fans of an aircraft are provided with an array of deflectors of the jalousie type forming a directed outflow path. The deflectors are generally of airfoil or aerodynamic profile and have flexible skins with an internal mechanism enabling the curvature to be altered to adjust the outflow direction through at least 105*.
Inventors
- 👤 Hans-Luzius Studer
- 👤 Eckart Petri
- 👤 Karl Wurmstedt
- 👤 Jan Tomas Haas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:39
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/002; F02K1/006; B; B64; B64C; B64C29/00; B64C29/0008; B64C29/0041; B64C29/0066
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
222 words
In a fan-type power plant for an aircraft, in combination: means forming an air-flow duct having an inlet and an outlet; a fan mounted in said duct between said inlet and said outlet for inducing a flow of air providing thrust for the aircraft through said duct and discharging same in an outflow through said outlet; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a first conformation wherein said blades extend generally in the direction of the outflow and are of an aerodynamic profile substantially symmetrical about a median plane therethrough, and a second conformation wherein the blade is curved to deflect said outflow, said blades being elastically deformable between said conformations, each of said blades being formed with: a head translationally fixed in said duct and disposed at an end of the blade facing said fan in said first conformation, a trailing end remote from said blade and shiftable in said duct, said head extending over substantially 20 to 30 percent of the length of the blade between said ends, a flexible upper side, and a flexible lower side, at least one of said sides being composed of sheet metal of a thickness tapering in the direction of said trailing end; and means for bending said blades to alter the conformation thereof.
Claim 2
Dependent Claim
222 words
In a fan-type power plant for an aircraft, in combination: means forming an air-flow duct having an inlet and an outlet; a fan mounted in said duct between said inlet and said outlet for inducing a flow of air providing thrust for the aircraft through said duct and discharging same in an outflow through said outlet; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a first conformation wherein said blades extend generally in the direction of the outflow and are of an aerodynamic profile substantially symmetrical about a median plane therethrough, and a second conformation wherein the blade is curved to deflect said outflow, said blades being elastically deformable between said conformations, each of said blades being formed with: a head translationally fixed in said duct and disposed at an end of the blade facing said fan in said first conformation, a trailing end remote from said blade and shiftable in said duct, said head extending over substantially 20 to 30 percent of the length of the blade between said ends, a flexible upper side, and a flexible lower side, at least one of said sides being composed of sheet metal of a thickness tapering in the direction of said trailing end; and means for bending said blades to alter the conformation thereof.
Claim 3
Dependent Claim
69 words
The combination defined in claim 1 wherein, the blades in the upper portion of said duct are oriented with a positive angle with respect to the axis of said fan and the blades of a lower portion of said duct are oriented with a negative angle relative to said axis in the first conformation of the blades to increase the velocity of the outflow traversing said array of blades.
Claim 4
Dependent Claim
208 words
In a fan-type power plant for an aircraft, in combination; means forming an air-flow duct having an inlet and an outlet; a fan mounted in said duct between said inlet and said outlet for inducing a flow of air providing thrust for the aircraft through said duct and discharging same in an outflow through said outlet; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a first conformation wherein said blades extend generally in the direction of the outflow and are of an aerodynamic profile substantially symmetrical about a median plane therethrough, and a second conformation wherein the blade is curved to deflect said outflow, said blades being elastically deformable between said conformation, each of said blades having: a head facing in the direction of said fan at one end of the blade in said first conformation, a trailing end remote from said blade, and a flexible skin between said ends forming upper and lower sides of the blade, said sides being mutually symmetrical about the respective median plane in said first conformation and said lower side being concave while said upper side is convex in said second conformation; and means for bending said blades to alter the conformation thereof.
Claim 5
Dependent Claim
208 words
In a fan-type power plant for an aircraft, in combination; means forming an air-flow duct having an inlet and an outlet; a fan mounted in said duct between said inlet and said outlet for inducing a flow of air providing thrust for the aircraft through said duct and discharging same in an outflow through said outlet; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a first conformation wherein said blades extend generally in the direction of the outflow and are of an aerodynamic profile substantially symmetrical about a median plane therethrough, and a second conformation wherein the blade is curved to deflect said outflow, said blades being elastically deformable between said conformation, each of said blades having: a head facing in the direction of said fan at one end of the blade in said first conformation, a trailing end remote from said blade, and a flexible skin between said ends forming upper and lower sides of the blade, said sides being mutually symmetrical about the respective median plane in said first conformation and said lower side being concave while said upper side is convex in said second conformation; and means for bending said blades to alter the conformation thereof.
Claim 6
Dependent Claim
65 words
The combination defined in claim 3, further comprising a respective rigid conformation piece movably received in each of said blades and having a concave curvature facing the inner surface of said lower side, and means for shifting said conformation pieces into engagement with the said inner surfaces of said blades to define the curvatures of said lower sides in the second conformation of said blades.
Claim 7
Dependent Claim
40 words
The combination defined in claim 4 wherein the means for bending said blades includes a lever arrangement actuatable by at least one pull-and-push rod articulated to said trailing end, said conformation piece and said head of each of said blades.
Claim 8
Dependent Claim
50 words
The combination defined in claim 3, further comprising a respective stack of leaf springs mounted in each of said blades and resiliently bearing upon the inner surface of said upper side for maintaining the convex curvature thereof upon bending of said blades from said first conformation to said second conformation.
Claim 9
Dependent Claim
51 words
The combination defined in claim 3, further comprising a respective set of channel-shaped ribs received in each of said blades and engaging the inner surfaces of said sides for maintaining a spacing therebetween, the skin of said upper side being formed by an array of overlapping mutually slidable elastic sheet-metal strips.
Claim 10
Dependent Claim
39 words
The combination defined in claim 7, further comprising means for introducing a pressurized gas into said blades between said ribs for discharge between said strips to restrict the breakaway of air stream along the upper side of each blade.
Claim 11
Dependent Claim
69 words
The combination defined in claim 13 wherein the blades in the upper portion of said duct are oriented with a positive angle with respect to the axis of said fan and the blades of a lower portion of said duct are oriented with a negative angle relative to said axis in the first conformation of the blades to increase the velocity of the outflow traversing said array of blades.
Claim 12
Dependent Claim
168 words
In a fan-type power plant for an aircraft, in combination means including a closed wall forming an air-flow duct having an inlet at one end and an outlet at an opposite end of said duct; a tip-turbine driven fan mounted in said duct between said inlet and said outlet for inducing a flow of air through said duct from said inlet and discharging same in an outflow through said outlet; means for directing hot combustion gases at the periphery of said fan for driving same; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a head turned toward said fan and a tail turned away from said fan and being formed with substantially continuous surfaces extending from its head to its tail, the blades each being elastically deformable to deflect its tail relative to its head and in part smoothly-curved contours to said surfaces; and control means connected with said blades for bending same elastically to alter the conformations thereof.
Claim 13
Dependent Claim
168 words
In a fan-type power plant for an aircraft, in combination means including a closed wall forming an air-flow duct having an inlet at one end and an outlet at an opposite end of said duct; a tip-turbine driven fan mounted in said duct between said inlet and said outlet for inducing a flow of air through said duct from said inlet and discharging same in an outflow through said outlet; means for directing hot combustion gases at the periphery of said fan for driving same; an array of substantially mutually parallel deflector blades extending across said outlet, each of said blades having a head turned toward said fan and a tail turned away from said fan and being formed with substantially continuous surfaces extending from its head to its tail, the blades each being elastically deformable to deflect its tail relative to its head and in part smoothly-curved contours to said surfaces; and control means connected with said blades for bending same elastically to alter the conformations thereof.
References Cited (Backward Citations)
US2891740A
Cited
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US3087303A
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US3100377A
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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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |