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US4170010A Expired / Lapsed US ⏱️ 0.0 years remaining

Inflatable radiation attenuator

Assignee: Boeing North American Inc
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Filing: 1968-03-04
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Granted: 1979-10-02
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Expires: 1988-03-04
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Abstract

Abstract An arrangement for providing an inflatable cover or structure having radar-energy absorbing characteristics. Thus, a structure may be either formed of, or covered by, this material -- which may be compacted during certain stages of its life, and inflated at other times in order to provide the desired radar-energy absorption.

Inventors

  • 👤 Robert G. Reed

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 15:47
CPC Classifications
H; H01; H01Q; H01Q17/00

Claims Analysis

Total Claims: 23
Claim 1
Independent Claim 54 words
An absorption-structure for absorbing electromagnetic radiation, comprising: means, comprising a sheet of radiation-reflecting material, for reflecting impinging electromagnetic radiation; means, comprising at least one sheet of radiation-absorbing material, for absorbing said electromagnetic radiation; and inflatable means for suitably positioning said absorbing-means relative to said reflecting means for optimizing the absorption of said electromagnetic radiation.
Claim 2
Dependent Claim 54 words
An absorption-structure for absorbing electromagnetic radiation, comprising: means, comprising a sheet of radiation-reflecting material, for reflecting impinging electromagnetic radiation; means, comprising at least one sheet of radiation-absorbing material, for absorbing said electromagnetic radiation; and inflatable means for suitably positioning said absorbing-means relative to said reflecting means for optimizing the absorption of said electromagnetic radiation.
Claim 3
Dependent Claim 21 words
The combination of claim 1 wherein said inflatable means comprises inflatable tubing, positioned between adjacent sheets, for spacing apart said sheets.
Claim 4
Dependent Claim 15 words
The combination of claim 1 wherein said inflatable means comprises an air-mattress type of structure.
Claim 5
Dependent Claim 18 words
The combination of claim 1 wherein said inflatable means comprise balloon type means for spacing apart said sheets.
Claim 6
Dependent Claim 23 words
The combination of claim 1 wherein said inflatable means comprises tension means, affixed to adjacent sheets, for spacing said sheets for optimum absorption.
Claim 7
Dependent Claim 38 words
The combination of claim 1 wherein said absorbing means comprises a plurality of absorbing-sheets, and wherein said inflatable means suitably positions all said absorbing means relative to said reflecting means to optimize the absorption of said electromagnetic radiation.
Claim 8
Dependent Claim 18 words
The combination of claim 6 wherein said absorbing-sheets have insertion-losses of about 7.4, 3.1, 2.9, and 0.4 db.
Claim 9
Dependent Claim 25 words
The combination of claim 6 wherein said inflatable means comprises tension means, affixed to adjacent sheets, for spacing said plurality of sheets for optimum absorption.
Claim 10
Dependent Claim 11 words
The combination of claim 8 wherein said tension means are staggered.
Claim 11
Dependent Claim 11 words
The combination of claim 8 wherein said tension means are angled.
Claim 12
Dependent Claim 22 words
The combination of claim 6 wherein said absorbing-structure comprises a pressurable outer sheath--whereby the volume within said outer sheath may be pressurized.
Claim 13
Dependent Claim 26 words
The combination of claim 6 wherein said absorbing-structure comprises a pressurizable outer sheath and a pressurizable inner sheath--whereby the volume between said sheaths may be pressurized.
Claim 14
Dependent Claim 67 words
A Salisbury-type screen for absorbing electromagnetic radiation, comprising: means, comprising a sheet of radiation-reflecting material, for reflecting impinging electromagnetic radiation; means, comprising a plurality of sheets of radiation-absorbing material, for absorbing electromagnetic radiation; means, comprising tension-elements positioned between--and affixed to--adjacent sheets for spacing said sheets to achieve optimum radiation absorption; and inflating means for urging apart said sheets of said screen to limits established by said tension-elements.
Claim 15
Dependent Claim 67 words
A Salisbury-type screen for absorbing electromagnetic radiation, comprising: means, comprising a sheet of radiation-reflecting material, for reflecting impinging electromagnetic radiation; means, comprising a plurality of sheets of radiation-absorbing material, for absorbing electromagnetic radiation; means, comprising tension-elements positioned between--and affixed to--adjacent sheets for spacing said sheets to achieve optimum radiation absorption; and inflating means for urging apart said sheets of said screen to limits established by said tension-elements.
Claim 16
Dependent Claim 18 words
The combination of claim 13 wherein said tension-elements comprise rectangular-fret configurations that are angled relative to each other.
Claim 17
Dependent Claim 17 words
The combination of claim 13 wherein said tension-elements comprise rectangular configurations that are parallel to each other.
Claim 18
Dependent Claim 16 words
The combination of claim 13 wherein said tension-elements comprise configurations that are staggered to each other.
Claim 19
Dependent Claim 19 words
The combination of claim 12 wherein said tension-elements comprise a strip-like configuration having their edges affixed to proximal sheets.
Claim 20
Dependent Claim 17 words
The combination of claim 12 wherein said tension-elements comprise strips having their ends affixed to proximal sheets.
Claim 21
Dependent Claim 38 words
The combination of claim 13 including: an outer sheath affixed to the outermost of said sheets; an inner sheath affixed to the innermost of said sheets; and means for causing said inflating means to urge apart said sheaths.
Claim 22
Dependent Claim 40 words
An absorption structure for absorbing electromagnetic radiation, comprising: means, comprising at least one sheet of radiation absorbing material, for absorbing said electromagnetic radiation; and inflatable means for suitably positioning said absorbing means for optimising the absorption of said electromagnetic radiation.
Claim 23
Dependent Claim 40 words
An absorption structure for absorbing electromagnetic radiation, comprising: means, comprising at least one sheet of radiation absorbing material, for absorbing said electromagnetic radiation; and inflatable means for suitably positioning said absorbing means for optimising the absorption of said electromagnetic radiation.

References Cited (Backward Citations)

US2814038A Cited
US3001196A Cited
US3170471A Cited
US3165751A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-10-01 1983-04-02 1983-10-02 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-10-01 1987-04-02 1987-10-02 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-10-01 1991-04-02 1991-10-02 $7700.00 Window Closed / Lapsed

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