US5824940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceramic bullet-proof fabric
Assignee: Alfred University
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Filing: 1997-01-27
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Granted: 1998-10-20
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Expires: 2017-01-27
Abstract
Abstract A bullet-proof fabric containing a first layer of high-strength fabric, a first layer of ceramic material below the first layer of high-strength fabric, and a second layer of high-strength fabric disposed below the first layer of ceramic material. The first layer ceramic material contains a multiplicity of ceramic structures, each of which has a first orifice extending through it, and a means for fastening the ceramic structure disposed within the orifice.
Inventors
- 👤 Juan Alexander Chediak
- 👤 Lincoln Clark Young
- 👤 Daniel Lee Edson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:06
CPC Classifications
F; F41; F41H; F41H5/00; F41H5/02; F41H5/04; F41H5/0414; F41H5/0428; F41H5/0435; F41H5/0492
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
239 words
A bullet-proof fabric comprising a first layer of high-strength fabric, a first layer of ceramic material disposed below said first layer of high-strength fabric, and a second layer of high-strength fabric disposed below said first layer of ceramic material, wherein: (a) each of said first layer high-strength fabric and said second layer of high-strength fabric is comprised of one sheet of high strength fabric, wherein said sheet of high-strength fabric is comprised of at least about 90 weight percent of fiber with a tensile strength of at least about 425,000 pounds per square inch and a density of less than 1.6 grams per cubic centimeter; (b) said first layer of ceramic material is comprised of a multiplicity of ceramic structures, wherein: 1. each of said ceramic structures is comprised of a first orifice extending through said ceramic structure, 2. a means for fastening said ceramic structure is disposed within said first orifice, 3. said first layer of ceramic material contains from about 16 to about 200 of said ceramic structures for each square foot of surface area of said first layer of ceramic material, and 4. each of said ceramic structures is comprised of at least about 90 weight percent of ceramic material, wherein said ceramic material has a Young's modulus of at least about 10,000,000 pounds per square inch, a porosity of less than 20 volume percent, and a toughness of less than about 6 megaPascals--meters 0 .5.
Claim 2
Dependent Claim
239 words
A bullet-proof fabric comprising a first layer of high-strength fabric, a first layer of ceramic material disposed below said first layer of high-strength fabric, and a second layer of high-strength fabric disposed below said first layer of ceramic material, wherein: (a) each of said first layer high-strength fabric and said second layer of high-strength fabric is comprised of one sheet of high strength fabric, wherein said sheet of high-strength fabric is comprised of at least about 90 weight percent of fiber with a tensile strength of at least about 425,000 pounds per square inch and a density of less than 1.6 grams per cubic centimeter; (b) said first layer of ceramic material is comprised of a multiplicity of ceramic structures, wherein: 1. each of said ceramic structures is comprised of a first orifice extending through said ceramic structure, 2. a means for fastening said ceramic structure is disposed within said first orifice, 3. said first layer of ceramic material contains from about 16 to about 200 of said ceramic structures for each square foot of surface area of said first layer of ceramic material, and 4. each of said ceramic structures is comprised of at least about 90 weight percent of ceramic material, wherein said ceramic material has a Young's modulus of at least about 10,000,000 pounds per square inch, a porosity of less than 20 volume percent, and a toughness of less than about 6 megaPascals--meters 0 .5.
Claim 3
Dependent Claim
14 words
The bullet-proof fabric as recited in claim 1, wherein said fastener is a thread.
Claim 4
Dependent Claim
23 words
The bullet-proof fabric as recited in claim 2, wherein said thread has a tensile strength of at least 425,000 pounds per square inch.
Claim 5
Dependent Claim
35 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a top surface and a bottom surface, and wherein said orifice extends from said top surface to said bottom surface.
Claim 6
Dependent Claim
32 words
The bullet-proof fabric as recited in claim 1, wherein each of said orifice extends from one side of each of said ceramic structures to another side of each of said ceramic structures.
Claim 7
Dependent Claim
23 words
The bullet-proof fabric as recited in claim 1, further comprising a layer of waterproof fabric disposed above said first layer of high-strength fabric.
Claim 8
Dependent Claim
23 words
The bullet-proof fabric as recited in claim 6, further comprising a layer of waterproof fabric disposed below said second layer of high-strength fabric.
Claim 9
Dependent Claim
31 words
The bullet-proof fabric as recited in claim 7, wherein said waterproof fabric prevents the transmission of substantially all light energy having a wavelength of from about 100 to about 4,000 angstroms.
Claim 10
Dependent Claim
21 words
The bullet-proof fabric as recited in claim 1, wherein said first layer of high-strength fabric is coated with a waterproof coating.
Claim 11
Dependent Claim
20 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a substantially circular cross-sectional shape.
Claim 12
Dependent Claim
19 words
The bullet-proof fabric as recited in claim 10, wherein each of said ceramic structures comprises a multiplicity of orifices.
Claim 13
Dependent Claim
17 words
The bullet-proof fabric as recited in claim 10, wherein each of said ceramic structures has rounded edges.
Claim 14
Dependent Claim
20 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a substantially rectangular cross-sectional shape.
Claim 15
Dependent Claim
20 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a substantially octagonal cross-sectional shape.
Claim 16
Dependent Claim
20 words
The bullet-proof fabric as recited in claim 1, wherein said first layer of high-strength fabric consists essentially of woven fabric.
Claim 17
Dependent Claim
20 words
The bullet-proof fabric as recited in claim 1, wherein said second layer of high-strength fabric consists essentially of woven fabric.
Claim 18
Dependent Claim
19 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures consists essentially of ceramic material.
Claim 19
Dependent Claim
25 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a cross-sectional area of less than about 9.0 square inches.
Claim 20
Dependent Claim
25 words
The bullet-proof fabric as recited in claim 1, wherein each of said ceramic structures has a cross-sectional area of less than about 2.0 square inches.
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) | 2001-10-19 | 2002-04-20 | 2002-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-10-19 | 2006-04-20 | 2006-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-10-19 | 2010-04-20 | 2010-10-20 | $7700.00 | Window Closed / Lapsed |