US3645478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Takeoff and landing platform for vertical takeoff and landing planes
Assignee: ENTWICHLUNGSRING SUED GmbH
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Filing: 1968-11-19
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Granted: 1972-02-29
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Expires: 1988-11-19
Abstract
Abstract A jet stream dispersion takeoff and landing platform for vertical takeoff and landing airplanes including a flat plate member having an upper jet stream inlet side and a lower jet stream outlet side, supporting legs therefor, the plate member further having a plurality of circular openings therethrough with a downwardly opening circular closure for each of the openings and U-shaped brackets on the outlet side supporting and limiting the downward opening of each circular closure.
Inventors
- 👤 Gero Otto Madelung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:01
CPC Classifications
E; E01; E01C; E01C9/00; E01C9/008; B; B64; B64F; B64F1/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A jet stream dispersion apparatus of the character described, comprising a flat plate member having a jet stream inlet side and a jet stream outlet side, supporting means therefor, said plate member having a plurality of openings therethrough, a closure for each of the openings, means for slidably mounting said closures for reciprocal movement from an opened to a closed position, said mounting means including a substantially U-shaped bracket attached to the outlet side of said plate and having means for slidably supporting said closure, said bRacket being positioned relative to said closure such that when said closure is in the open position, a substantially unrestricted passageway is defined for flow of the jet stream past said closure and said bracket, and biasing means normally holding the closures in closed position.
Claim 2
Dependent Claim
131 words
A jet stream dispersion apparatus of the character described, comprising a flat plate member having a jet stream inlet side and a jet stream outlet side, supporting means therefor, said plate member having a plurality of openings therethrough, a closure for each of the openings, means for slidably mounting said closures for reciprocal movement from an opened to a closed position, said mounting means including a substantially U-shaped bracket attached to the outlet side of said plate and having means for slidably supporting said closure, said bRacket being positioned relative to said closure such that when said closure is in the open position, a substantially unrestricted passageway is defined for flow of the jet stream past said closure and said bracket, and biasing means normally holding the closures in closed position.
Claim 3
Dependent Claim
25 words
A jet stream dispersion apparatus as defined in claim 1 wherein the openings in said plate member are circular and said closures are similarly shaped.
Claim 4
Dependent Claim
17 words
A jet stream dispersion apparatus as defined in claim 1 wherein said biasing means comprises spring means.
Claim 5
Dependent Claim
41 words
A jet stream dispersion apparatus as defined in claim 1 wherein the sidewalls of said openings are flared radially outwardly toward said outlet side and the sidewalls of said closures are correspondingly flared to mate with the sidewalls of said opening.
Claim 6
Dependent Claim
128 words
The combination of a landing platform and jet stream dispersing means for vertical takeoff and landing airplanes, said platform comprising a plate member having an upper jet stream inlet side and a lower jet stream outlet side, rigid means for spacing said plate member from and supporting said plate member above the ground, said means being of a strength to withstand the forces of the jet stream, said plate member having a plurality of openings therethrough, a downwardly opening reciprocating closure for each of the openings, a substantially U-shaped bracket on said outlet side of said plate member supporting and limiting the downward movement of each closure, said closures being partially disposed in the jet stream when in the open position for purposes of dispersing the jet stream.
Claim 7
Dependent Claim
128 words
The combination of a landing platform and jet stream dispersing means for vertical takeoff and landing airplanes, said platform comprising a plate member having an upper jet stream inlet side and a lower jet stream outlet side, rigid means for spacing said plate member from and supporting said plate member above the ground, said means being of a strength to withstand the forces of the jet stream, said plate member having a plurality of openings therethrough, a downwardly opening reciprocating closure for each of the openings, a substantially U-shaped bracket on said outlet side of said plate member supporting and limiting the downward movement of each closure, said closures being partially disposed in the jet stream when in the open position for purposes of dispersing the jet stream.
Claim 8
Dependent Claim
22 words
The combination as defined in claim 5 wherein the openings in said plate member are circular and said closures are similarly shaped.
Claim 9
Dependent Claim
19 words
The combination as described in claim 5 wherein said closures are biased to the closed position in said openings.
Claim 10
Dependent Claim
38 words
The combination as defined in claim 5 wherein the sidewalls of said openings are flared radially outwardly toward said outlet side and the sidewalls of said closures are correspondingly flared to mate with the sidewalls of said opening.
Claim 11
Dependent Claim
33 words
The combination of claim 1 wherein said limiting means includes a U-shaped bracket attached to the outlet side of said plate and having means in its bight portion for slidably supporting said closure.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |