Apparel – Guard or protector – Penetration resistant
Reexamination Certificate
2000-09-28
2002-09-17
Calvert, John J. (Department: 3765)
Apparel
Guard or protector
Penetration resistant
Reexamination Certificate
active
06449769
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to protective garments for resisting ballistic forces and more particularly to ballistic resistant pads formed of layered materials in such protective garments.
BACKGROUND OF THE INVENTION
In the evolution of protective garments, there has been an ever pressing desire to develop stronger, lighter, thinner, cooler, more breathable and thereby more wearable garments. Such garments are intended to resist certain potentially lethal forces such as those from gun shots. Typically, these garments are designed to protect the wearer from ballistic forces by preventing penetration through the garment from a projectile bullet.
Attempts at developing thin, light, heat resistant, flexible and breathable protective body armor have been made in order to create garments that are more wearable to the user. The more light, thin and less insulating the protective ballistic resistant garment is, the more likely the user (such as a law enforcement officer) will actually wear the garment, especially during the long hours of a working shift.
It is also desirable to have the protective body armor garment cover as much of the wearer's torso as possible while also maintaining wearability. The thinner and lighter the protective article, the more coverage can be offered. Concealability of the anti-ballistic body armor may also be improved if it is constructed to be thin and non-bulky. These attempts at developing thin and lightweight ballistic resistant body armor articles have also been made to try to allow increased freedom of movement and mobility so that the law enforcement officer wearing the article is not hampered from doing his or her job.
These attempts at reducing weight while improving the thinness of the article have previously been made by the utilization of layers of sheets of aramid fibers. High tensile strength aramid fibers such as Kevlar® produced by E. I. DuPont de Nemours & Company of Wilmington, Delaware, have often been employed in forming the woven ballistic fabric. Aramids such as Twaron® T-1000 and Twaron® T-2000 of AKZO NOBEL, Inc. have also been used in forming woven sheets of material in ballistic resistant pads. However, to increase the level of protection against higher caliber pistols and firearms more layers of ballistic resistant fabric are unfortunately required thereby increasing the overall weight and thickness of the garment while reducing its flexibility. Thus, there has been a long felt need to construct ballistic resistant pads which have improved wearability through the employment of lightweight and flexible high strength materials.
Various voluntary governmental ballistic standards have been established to certify certain ballistic resistant garments. The tests determine the ability of the garment to resist penetration from various ballistic rounds shot from various types of weapons. In particular, the National Institute of Justice (NIJ) Standard 0101.03 certification tests is a frequently used ballistics test for certifying certain body armor products. The NIJ Standard 0101.03 tests are grouped into different threat levels, with each threat level corresponding to ballistic projectile penetration stopping capabilities of various ballistic rounds fired from designated weapons. For generally concealable type ballistic resistant body armor NIJ Standard certification tests are often performed for NIJ threat levels IIA, II and IIIA. NIJ threat level IIIA is a higher standard level than NIJ threat level II and which in turn is a higher standard level than NIJ threat level IIA. There is therefore a need to provide thin and lightweight protective body armor garments having low insulating properties to increase their wearability, while also meeting test specifications of NIJ Standard 0101.03 Threat Level IIA, II and IIIA certification tests.
SUMMARY OF THE INVENTION
The foregoing needs noted above are met in accordance with the present invention by a ballistic resistant protective garment having a ballistic resistant pad with at least two panels and a plurality of overlying layered sheets in the panels of the ballistic resistant pad in which the sheets are constructed of woven lyotropic liquid crystal polymer fiber.
It is a further object of this invention to provide a ballistic resistant protective garment having a ballistic resistant pad with a plurality of overlying layered sheets of ballistic resistant material forming the pad in which the pad has an areal density not greater than 0.55 lbs/ft
2
, not greater than 0.66 lbs/ft
2
, and not greater than 0.82 lbs/ft
2
for a ballistic resistance that prevents projectile penetration of the ballistic resistant pad according to NIJ Standard 0101.03 for Threat Levels IIA, II and IIIA respectively.
It is a further object of this invention to provide a ballistic resistant protective garment which includes a ballistic resistant pad and a plurality of overlying layered sheets of ballistic resistant material forming the pad in which the pad has a thickness not greater than 0.15 inches, not greater than 0.18 inches and not greater than 0.23 inches for a ballistic resistance that prevents projectile penetration of the ballistic resistant pad according to NIJ Standard 0101.03 for Threat Levels IIA, II and IIIA respectively.
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patent: 5926842 (1999-07-01), Price et al.
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Calvert John J.
Muromoto Jr. Robert H.
Ring Thomas J.
Second Chance Body Armor, Inc.
Wildman Harrold Allen & Dixon
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