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US3648613A Expired / Lapsed US ⏱️ 0.0 years remaining

Bomb blanket

Assignee: Individual
•
Filing: 1970-11-04
•
Granted: 1972-03-14
•
Expires: 1990-11-04
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Abstract

Abstract A bomb blanket adapted to be placed over a bomb about to explode so as to minimize the lateral blast effect and to contain the spread of shrapnel, said blanket including upper and lower covers fabricated from moisture-resistant and fire-retarding material, a plurality of layers of ballistic cloth located between the covers to make the blanket shrapnel proof, and a plurality of centrally located apertures extending through the ballistic cloth with the size, number, and orientation of the apertures being parameters selected to permit the gas released by an explosion to vent therethrough and create a vacuum under the central portion of the blanket. The effectiveness of the blanket is due to the downward flexure or puckering of the corners of the blanket about the bomb as the bomb explodes so as to reduce the lateral blast effect and to prevent spread of shrapnel, such puckering being primarily attributable to the partial vacuum or venturi effect created on the underside of the blanket in the central region thereof as the gas released by an explosion vents through the apertures. The effect is enhanced by limiting the number of layers of ballistic cloth which extend the full dimension of the blanket so as to allow the corners of the blanket to more readily flex downwardly to enclose about the bomb. The effect is still further enhanced by tightening an adjustable strap arrangement to initially set the blanket in a puckered state about the bomb prior to explosion.

Inventors

  • 👤 Arthur Cunn

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 04:02
CPC Classifications
F; F42; F42D; F42D5/00; F42D5/04; F42D5/045; F42D5/05

Claims Analysis

Total Claims: 14
Claim 1
Independent Claim 121 words
A blanket comprising a. a first plurality of layers of ballistic cloth, b. a second plurality of layers of ballistic cloth superimposed on a central portion of said first plurality of layers of ballistic cloth, c. the periphery of said second plurality of layers of ballistic cloth terminating short of the periphery of said first plurality of layers of ballistic cloth whereby the periphery of said blanket is flexible and light in relation to the central portion of said blanket, d. a plurality of aperture means extending through said first and second plurality of layers of ballistic cloth for allowing passage of sufficient gas therethrough to create a partial vacuum under said central portion when a bomb explodes beneath said blanket.
Claim 2
Dependent Claim 121 words
A blanket comprising a. a first plurality of layers of ballistic cloth, b. a second plurality of layers of ballistic cloth superimposed on a central portion of said first plurality of layers of ballistic cloth, c. the periphery of said second plurality of layers of ballistic cloth terminating short of the periphery of said first plurality of layers of ballistic cloth whereby the periphery of said blanket is flexible and light in relation to the central portion of said blanket, d. a plurality of aperture means extending through said first and second plurality of layers of ballistic cloth for allowing passage of sufficient gas therethrough to create a partial vacuum under said central portion when a bomb explodes beneath said blanket.
Claim 3
Dependent Claim 13 words
The blanket of claim 1, means for flexing the corners of said blanket.
Claim 4
Dependent Claim 65 words
The blanket of claim 2, wherein the means for flexing the corners of saiD blanket includes a plurality of spaced straps secured to the top of said blanket, each of said straps having a loop at its inner end, and means passing through all of said straps, means for adjusting the length of said last mentioned means to exert a pulling force upon said straps.
Claim 5
Dependent Claim 24 words
The blanket of claim 1, including upper and lower imperforate cover members covering said ballistic cloth to protect the same from fire and moisture.
Claim 6
Dependent Claim 17 words
The blanket of claim 4, said cover member being constructed from material which is waterproof and flameproof.
Claim 7
Dependent Claim 14 words
The blanket of claim 1, means for releasably securing a pole to said blanket.
Claim 8
Dependent Claim 20 words
The blanket of claim 1, wherein said first plurality of layers comprise between five and fifteen layers of ballistic cloth.
Claim 9
Dependent Claim 25 words
The blanket of claim 1, the dimension of said first plurality of layers is less than three-fourths the dimension of said second plurality of layers.
Claim 10
Dependent Claim 24 words
The blanket of claim 1, said plurality of apertures each having a diameter less than 1 inch and greater than 1/4 of an inch.
Claim 11
Dependent Claim 24 words
The blanket of claim 9, said plurality of apertures ranging in number between five and 25 for each 4 square foot area of blanket.
Claim 12
Dependent Claim 13 words
The blanket of claim 1, said plurality of apertures arranged in circular paths.
Claim 13
Dependent Claim 14 words
The blanket of claim 1, each of said apertures being circular in cross section.
Claim 14
Dependent Claim 16 words
The blanket of claim 1, wherein said plurality of apertures are situated in two concentric rows.

References Cited (Backward Citations)

US2326713A Cited
US3491847A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-03-14 1975-09-13 1976-03-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-03-14 1979-09-13 1980-03-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-03-14 1983-09-13 1984-03-14 $7700.00 Window Closed / Lapsed

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